Do we simply cease to exist, dissolving into nothingness? Do we reincarnate into new forms? Or is there something more substantial awaiting us beyond our final breath?

While many worldviews offer speculation about life after death, Christianity provides revelation from the God who created both life and death. Scripture tells us that we don’t have to wonder about our eternal destiny because God has clearly revealed what awaits us.

The question isn’t whether there’s an afterlife, but rather what kind of existence we’ll experience based on our relationship with Jesus Christ during our earthly lives.

Is There Life After Death?

To answer whether there’s life after death, we must first address several foundational questions that determine how we understand human existence and our ultimate destiny.

Does God Exist, and What Kind of God Is He?

If no God exists, death would likely represent our final chapter. But substantial evidence points toward a personal, eternal Creator who designed the universe with purpose and meaning. The space-time theorems, developed by physicists like Arvind Borde, Alan Guth, Stephen Hawking, Roger Penrose, and Alexander Vilenkin, demonstrate that our universe had a beginning and requires a cause that transcends space, time, matter, and energy. This cause must be incredibly powerful, intelligent, and personal to create a universe fine-tuned for life.

The God revealed in Scripture matches this description perfectly. He’s not a distant, impersonal force, but a loving Father who created humans for a relationship with him. Because God is eternal and personal, your life has meaning that extends beyond your biological existence. The same God who spoke the universe into existence also breathed life into humanity, creating us as everlasting beings designed for fellowship with him.

What Does It Mean to Be Human and Made in God’s Image?

Understanding human nature is crucial for grasping what happens after death. We’re not highly evolved animals or merely complex biological machines. The Bible teaches that all humans descend from Adam and Eve, the first two people specially created by God. While we’re biologically classified as Homo sapiens sapiens, we’re fundamentally different from all other creatures because we bear God’s image.

This divine image means we possess spiritual capacity, moral responsibility, and eternal significance. Some suggest we evolved from earlier species, but the evidence in the fossil record and human behavior doesn’t align with that theory. That’s because humans didn’t evolve from animals—we were created not just with bodies but with souls that can commune with our Creator, make moral choices, and exist beyond physical death. This spiritual dimension of human nature is what continues after our bodies stop functioning.

Is There Anything Beyond Our Physical Universe?

Science explores measurable phenomena within space and time, but it doesn’t rule out realities beyond the physical universe. In fact, the space-time theorems prove that whatever caused our universe must exist outside matter, energy, and the cosmic space-time dimensions. This transcendent realm is precisely where the Bible locates God, angels, human souls after physical death, and the eternal destinations of heaven and hell.

Modern physics has revealed that our universe contains mysterious elements like dark matter and dark energy that we can’t directly observe but know must exist through their effects. Similarly, the spiritual realm may not be directly measurable by scientific instruments, yet its reality is seen through human consciousness, moral awareness, and spiritual experiences that go beyond purely physical explanations.

Just the fact that we are conscious is hard to explain if you believe only physical matter exists. How could nonliving matter produce self-aware people who are able to think about their own existence and ponder questions about the origin and history of the universe, life, and what exists beyond the universe and earthly lives? The best answer is that our consciousness comes from a conscious Creator who designed us as spiritual beings living in temporary physical bodies.

Has Anyone Spoken with Authority About Life After Death?

Jesus Christ stands uniquely qualified to address questions about the afterlife. Unlike religious teachers who speculated about postmortem existence, Jesus claimed direct, personal knowledge of eternal realities. He declared, “No one has ever gone into heaven except the one who came from heaven—the Son of Man” (John 3:13).

Jesus didn’t merely teach about eternal life; he claimed to be “the resurrection and the life” (John 11:25). His own resurrection from the dead provides the ultimate evidence that death isn’t humanity’s final destination. The apostle Paul noted that over 500 people witnessed Jesus alive after his crucifixion, providing historical testimony that he conquered death.

This historical evidence for Jesus’s resurrection sets Christianity apart from other worldviews about life after death. Rather than philosophical speculation or mystical experiences, we have an empty tomb that was guarded by a cohort of Roman soldiers, documented testimony from eyewitnesses who saw, touched, and spoke with Jesus after his death, and nearly half the population of Jerusalem who became Christians within just a few weeks of the crucifixion and resurrection of Jesus. The willingness of the eyewitnesses to face persecution and martyrdom for their testimony suggests they genuinely believed in what they witnessed.

Common Views About the Afterlife

Throughout history, humans have developed various beliefs about what happens after death. These perspectives range from complete extinction to elaborate systems of reincarnation and spiritual progression. Understanding these different viewpoints helps clarify why the Christian answer to questions about an afterlife offers unique hope and certainty.

Materialistic worldviews, popular in secular academia, argue that consciousness is merely a byproduct of brain activity. When the brain dies, consciousness ceases, and the person simply stops existing. This perspective offers no hope beyond the grave and reduces human existence to temporary arrangements of matter and energy. This conclusion fails to explain why humans universally believe that their lives have purpose and meaning beyond their earthly lives. The Bible offers an explanation. Ecclesiastes 3:11 states that God has written eternity upon the hearts of all people.

Eastern religions often teach reincarnation, suggesting that souls transmigrate through multiple lifetimes, working toward eventual enlightenment or unity with the divine. These systems typically view individual personality as ultimately illusory, with the goal being escape from the cycle of rebirth. Reincarnation also gives people the false hope of second, third, and fourth chances—that if we mess up in this life we will get another chance in the next. Hebrews 9:27 declares that we all are destined to die once and after that to face judgment. The universal fear of judgment after death testifies of the reality of this biblical statement.

Various forms of universalism (the belief that all people will ultimately be saved) propose that everyone eventually reaches the same positive destination, regardless of their earthly beliefs or actions. Some versions suggest that hell, if it exists, is temporary and rehabilitative rather than eternal.

Agnostic positions maintain that we simply cannot know what, if anything, happens after death. This uncertainty leads some people to focus entirely on present existence while avoiding questions about eternal destiny.

In contrast, the Christian view of life after death provides clear, hopeful answers grounded in God’s revelation. According to Scripture, humans continue to exist consciously after physical death, with their eternal destiny determined by their relationship with Jesus Christ during their earthly lives. Believers experience eternal life with God, while those who reject Christ face eternal separation from him.

Unlike reincarnation systems that offer endless cycles without guaranteed resolution, Christianity promises definitive eternal outcomes. And Unlike universalism, it acknowledges the reality of human moral choice and divine justice. Unlike materialism, it affirms the profound dignity and eternal significance of human persons. And unlike agnosticism, it provides confident hope based on God’s trustworthy revelation and Christ’s victory over death. Christianity also puts the ball in our court. We all choose where we spend eternity: with God and his followers or apart from God and his followers.

What Happens When You Die?

The moment of death marks a profound transition, but not an ending. Scripture reveals a detailed sequence of events that unfold when someone dies, providing comfort for believers and urgency for those who haven’t yet trusted Christ.

Physical Death: The Separation of Body and Soul

Physical death occurs when the soul separates from the body. The body begins returning to dust, as God warned Adam would happen after sin entered the world. However, the spiritual part of the person—what Scripture calls the soul or spirit—continues existing. Ecclesiastes 12:7 describes this process: “The dust returns to the ground it came from, and the spirit returns to God who gave it.”

This separation explains why death feels so unnatural and tragic. We weren’t originally designed to experience the tearing apart of our body-soul unity. Death entered human experience as a consequence of sin, disrupting the harmony God intended for human existence.

The moment of death is precisely that—a moment. There’s no gradual fading of consciousness or intermediate state of nonexistence. The soul immediately transitions from earthly life to its eternal destination, fully conscious and aware.

For Believers: Presence with Christ

For those who have trusted Jesus Christ as Savior, death means immediate entrance into his presence. Paul described this reality when he wrote about being “away from the body and at home with the Lord” (2 Corinthians 5:8). The believer’s soul goes directly to heaven, experiencing the joy and peace of being with Christ.

This doesn’t mean Christians receive their final, eternal bodies immediately upon death. Rather, they exist in a temporary but wonderful state, awaiting the future resurrection when their souls will be reunited with glorified, incorruptible, eternal bodies. During this time, they’re conscious, happy, and free from all the pain and sorrow that characterized earthly life.

Jesus promised the repentant thief on the cross, “Today you will be with me in paradise” (Luke 23:43), confirming that believers don’t wait for some future judgment to determine their destiny. Their eternal security was settled the moment they trusted Christ, and death simply ushers them into the fulfillment of that promise.

For Unbelievers: Awaiting Judgment

Those who die without trusting Christ face a very different experience. They don’t go immediately to the final hell (the lake of fire), but to a temporary place of conscious torment while awaiting final judgment. Jesus described this in his account of the rich man and Lazarus, where the rich man experienced immediate anguish after death (Luke 16:22–24).

This temporary place of punishment demonstrates God’s justice while preserving the future resurrection and final judgment. Unbelievers remain conscious, aware of their spiritual condition, and unable to change their eternal destiny. The rich man in Jesus’s story could see, think, speak, and feel pain, confirming that death doesn’t bring unconsciousness or a second chance for salvation. As the apostle Paul explained in his New Testament letters, the decisions we make in our earthly lives either result in our becoming captive to Christ’s will or captive to Satan’s will.

The reality of conscious suffering after death underscores the urgency of the gospel message. People cannot make decisions about Christ after they die; their eternal destiny is determined during their earthly lifetimes based on their responses to God’s offer of salvation.

The Future Resurrection and Final Judgment

When Christ returns, all the dead will be raised with eternal bodies. Believers will participate in the “first resurrection,” receiving glorified bodies like Christ’s resurrection body (1 Corinthians 15:42–44). These bodies will be physical yet perfected, capable of existing eternally without decay, pain, injury, or death.

Unbelievers will also be resurrected, but to face final judgment at the great white throne (Revelation 20:11–15). They’ll receive eternal bodies capable of existing forever, but these bodies will experience eternal punishment rather than eternal joy. The lake of fire represents their final destination, where they’ll experience the full weight of God’s justice for their rebellion and rejection of his Son. Those who have sinned much will experience more torment/restraint than those who have sinned less (Hebrews 10:29). Each inhabitant of hell will receive the precise amount of torment/restraint needed to prevent hell from becoming worse than it otherwise is.

This future resurrection explains why the Christian hope extends beyond merely “going to heaven when we die.” We look forward to bodily resurrection and eternal life in perfected physical form, living forever in the new heavens and new earth that God will create.

The New Heavens and New Earth

The ultimate destiny for believers isn’t a disembodied existence in heaven or clouds upon which we play harps, but eternal life in the new heavens and new earth that God will create (Revelation 21–22). This will be a physical realm where resurrected believers live forever with glorified bodies, enjoying perfect fellowship with God and each other.

This new creation will be radically different from our current world. It will be a realm governed by different dimensions and different physics. The present physics and dimensions will no longer be needed since Jesus Christ will have completely eradicated the possibility of evil and sin. Because of the new physics and dimensions, there will be no decay, death, mourning, crying, or pain.

In the new creation, Christ’s human followers will rule with him over everything he created. Paul explains that redeemed humans will be teaching and judging the angels. Unlike the angels, humans directly experience the grace of God and consequently are being prepared for unimaginably rewarding careers in the new creation. As Paul declared in 1 Corinthians 2:9, no one can imagine how great and wonderful human life will be in the new creation.

What Does the Bible Say About Life After Death?

Scripture consistently affirms that human consciousness continues after physical death, providing specific details about what happens that give believers confidence and hope.

Jesus demonstrated this reality through his own teachings and actions. When he told the thief on the cross, “Today you will be with me in paradise” (Luke 23:43), he confirmed that believers experience immediate, conscious fellowship with him after death. There’s no waiting period or unconscious sleep, but a direct transition into his presence. The sleep that Jesus spoke of in heaven refers to the fact that believers in heaven will be spectators but not participants in ongoing events on Earth (Revelation 6:9-11). This sleep ends when Jesus completes his redemptive work.

The story of the rich man and Lazarus (Luke 16:19–31) provides additional insight into postmortem consciousness. Both men remained fully aware after death, with fixed destinies that couldn’t be changed. The rich man could think, speak, remember his earthly life, and feel anguish, while Lazarus experienced comfort and peace. Importantly, no second chances were offered, and the gulf between their destinations was unbridgeable.

Paul’s teaching in 2 Corinthians 5:6–8 further confirms conscious existence after death for believers. He described being “absent from the body” as being “present with the Lord,” indicating immediate transition rather than unconscious waiting. Paul actually preferred death (the next state) to continued earthly life because it meant closer fellowship with Christ (Philippians 1:21–23).

The book of Revelation provides symbolic glimpses of conscious existence after death. In Revelation 6:9–10, martyred believers are seen calling out, “How long, Sovereign Lord, holy and true, until you judge the inhabitants of the earth and avenge our blood?” This passage shows that believers in heaven remain aware of earthly events and eagerly anticipate God’s final justice.

These biblical passages consistently portray life after death as conscious, immediate, and irreversible. There’s no indication of soul sleep, purgatory, or second chances after death. Instead, Scripture presents a clear picture of continued existence in either blessed fellowship with Christ or conscious separation from him, depending on one’s earthly response to the gospel.

The Promise of Life in Jesus

The Christian message about life after death centers on hope rather than fear because of what Jesus Christ accomplished through his death and resurrection. Eternal life isn’t something we earn through good works or religious observance, but a gift freely offered through faith in Christ.

Jesus declared, “I am the resurrection and the life. The one who believes in me will live, even though they die; and whoever lives by believing in me will never die” (John 11:25–26). This promise extends to everyone who trusts him as Savior, regardless of their past failures or present circumstances.

The Christian hope extends beyond simply avoiding hell or gaining heaven. Believers look forward to bodily resurrection and eternal life in the new creation, where they’ll experience perfect relationships, meaningful work, and intimate fellowship with God forever. This represents the fulfillment of every human longing for purpose, beauty, love, and significance.

However, this gift must be received during our earthly lives. Scripture warns that “now is the day of salvation” (2 Corinthians 6:2), emphasizing that our eternal destiny is determined before we die. Those who postpone this decision risk facing death without the security that comes from trusting Christ.

The post <em class="algolia-search-highlight">Life</em> After Death: What Happens After We Die? appeared first on Reasons to Believe.

But what makes this question both beautiful and hopeful is that you don’t have to answer it alone. In fact, it’s not even primarily your question to answer. God’s Word provides clear guidance about this question, and the answer is simpler than you might expect.

The short answer? You were created to glorify God and enjoy him forever, and he has prepared specific good works for you to accomplish. Your life has divine purpose, divine design, and divine direction.

You’re not wandering aimlessly through existence, hoping to stumble upon meaning. You were made on purpose, for a purpose, by a God who loves you and has plans for your life.

The Purpose of Life

First, we need to understand the question “Why do I exist?” The Westminster Shorter Catechism poses this foundational question: “What is the chief end of man?” The answer is beautifully simple: “Man’s chief end is to glorify God, and to enjoy him forever.”

This isn’t just theological language, it’s the bedrock truth about human existence. You weren’t created by accident or as the result of random cosmic events. You exist because God wanted you to exist. As Scripture tells us, “For we are God’s handiwork, created in Christ Jesus to do good works, which God prepared in advance for us to do” (Ephesians 2:10).

This echoes Jesus’s own words when he was asked about the greatest commandment: “‘Love the Lord your God with all your heart and with all your soul and with all your mind.’ This is the first and greatest commandment. And the second is like it: ‘Love your neighbor as yourself’” (Matthew 22:37–39). Here we see both aspects of our purpose in life: loving God supremely and loving others genuinely.

Research in psychology consistently shows that humans have an intrinsic need for meaning and purpose. Studies demonstrate that people who report having a strong sense of purpose in life show better mental health, greater resilience, and even longer lifespans. This isn’t surprising from a Christian perspective. We were designed by God for a purpose, so naturally we flourish when we’re living according to our design.

Different religions and worldviews offer competing answers to life’s biggest questions—where we came from, why we’re here, and what ultimately gives life meaning. But here’s where the Christian understanding of life’s purpose differs dramatically from secular attempts to create meaning. From the Christian view, without God, any meaning we try to create is ultimately subjective and temporary. As philosopher Thomas Morris notes, we can only endow with meaning those things over which we have requisite control. The problem is that so much of life lies beyond our control.

In contrast, when we understand that our lives derive meaning from God himself, we’re anchored to something objective and eternal. God possesses intrinsic meaning, and we, being made in his image, derive our meaning from him. This transforms everything about how we approach the question of “What should I do with my life?”

What Should I Do With My Life?

You should live the life God has assigned to you, seeking to glorify him and enjoy him in whatever circumstances you find yourself. And you should love God with everything you have and love your neighbor as yourself. You should walk in the good works God has prepared for you, trusting that he will guide you step by step.

Within the question of what to do with your life are other questions that deserve answers. Let’s also take a look at those and what God has to say.

What Is the Point of Life?

The point of life isn’t to accumulate wealth, achieve fame, land your dream job, lead a fulfilling career, or even to be happy all the time. The point of life is to know God and make him known to others.

It’s to reflect his character and participate in his work in the world. This gives every moment of your life, big or small, significance.

God’s design for life is relational. He created us for relationships with himself and with others. When we live according to this design, we experience the deep satisfaction that comes from living as we were meant to live. Even in difficult circumstances, even when life doesn’t go according to our plans, we can find purpose in knowing that we’re part of God’s larger story.

What Can I Do With My Life?

The highest possibility for your life is to be transformed by God’s grace and to become an instrument of his love in the world. You can be part of God’s redemptive work, bringing hope to the hopeless, healing to the broken, and delivering good news to those who need it most.

This doesn’t necessarily mean you need to become a missionary or pastor, though you might. It means that whatever you do, you can do it as a service to God and others. You can be a teacher who shapes young minds, a businessperson who operates with integrity, a parent who raises children to know and love God, or a friend who shows Christ’s love to those around you.

What Do I Do With My Life?

Maybe your life feels messy right now. Maybe you’ve made mistakes, faced unexpected hardships, or find yourself in circumstances you never planned. Here’s the beautiful truth: God can use every part of your story, including the difficult chapters.

The apostle Paul faced imprisonment, persecution, illness, and ultimately death. Yet he wrote, “I have learned to be content whatever the circumstances” (Philippians 4:11). Paul’s contentment flowed from recognizing that God was with him in every circumstance and God would strengthen him to endure. Paul understood that his circumstances, even the painful ones, were part of God’s assignment for his life.

Your current circumstances, whatever they are, can be the very place where God wants to use you, so look for God’s presence in those circumstances. Don’t wait for perfect conditions to start living purposefully. Start where you are, with what you have, trusting that God can work through your limitations and even your failures.

What Should I Be Doing With My Life?

If you’re feeling lost or stuck, take heart. The very fact that you’re asking this question shows that God has placed eternity in your heart. He’s drawing you toward the purpose for which you were made.

Start by recognizing that your calling isn’t just about your career path or major life decisions. Your calling includes how you treat the cashier at the grocery store, how you respond to frustration, how you use your time and resources, and how you interact with family and friends. God is calling you to love him and love others in every aspect of your life.

You don’t have to figure out your entire life’s purpose all at once. Focus on being faithful in the opportunities God gives you today. As Jesus said, “Whoever can be trusted with very little can also be trusted with much” (Luke 16:10).

What to Do In Your Life

Now for the practical steps. If you want to live the life God has assigned to you, here are specific actions you can take.

Read the Bible Regularly

God’s Word is our primary source for understanding his will for our lives. Through Scripture, we learn about God’s character, his values, and his desires for how we should live. Make Bible reading a regular habit. Aim to seek genuine knowledge of God and avoid making the reading a quick checklist item.

Start with the Gospels to understand who Jesus is, then explore the rest of the New Testament to learn how to live as his followers. The Old Testament shows us God’s character and his faithfulness throughout history.

Pray Regularly and Learn to Listen

Prayer isn’t just talking to God; it’s developing a relationship with him. Learn to listen for God’s voice through his Word, through wise counsel, through circumstances, and through the gentle promptings of the Holy Spirit in your heart.

Set aside time each day for prayer, but also learn to pray throughout the day. Ask God for wisdom in decisions, both big and small. Thank him for his blessings. Confess your sins and ask for forgiveness. Pray for others. As you develop this habit, you’ll find yourself becoming more aware of God’s presence and guidance in your life.

Join a Christian Community

God didn’t design us to live the Christian life alone. We need the encouragement, accountability, and support of other believers. Find a local church where the Bible is taught faithfully and where you can both give and receive love and support.

Church attendance isn’t just about what you can get out of it. It’s about using your gifts to serve others and being part of something bigger than yourself. Look for ways to contribute to your church community, whether that’s through formal ministry roles or simply by being a faithful, encouraging presence in the lives of others.

Seek Wise Counsel

Proverbs tells us that “plans fail for lack of counsel, but with many advisers they succeed” (Proverbs 15:22). When facing major decisions or feeling uncertain about direction, seek guidance from mature Christians who know you well and can offer biblical wisdom.

Don’t just seek advice from people who will tell you what you want to hear. Look for those who will speak truth in love, even when it’s difficult to hear. Consider talking with pastors, mentors, or trusted friends who demonstrate wisdom and spiritual maturity in their own lives.

Take a Spiritual Gifts Inventory

God has given every believer spiritual gifts to be used for building up his church and the advancement of his kingdom. Take time to discover your spiritual gifts through assessment tools, observation of where God seems to use you effectively, and feedback from other believers.

Your spiritual gifts might include teaching, serving, encouraging, giving, leadership, mercy, or many others (Romans 12:6-8). Understanding your gifts can help guide you toward areas where God might want to use you, both in formal ministry and in everyday life.

Ask Yourself Key Questions

Regularly examine your life with these questions: Do my activities, job, and thoughts glorify God? Am I growing closer to God and enjoying him more? Do I love others well? Am I being faithful with the responsibilities God has given me?

These questions aren’t meant to create guilt or anxiety but to help you stay aligned with God’s purposes for your life. When you notice areas where you’re falling short, remember that God’s grace is sufficient and his mercies are new every morning.

Remember Your Salvation

Never forget that you are saved by grace through faith, not by works (Ephesians 2:8–9). Your identity and worth don’t depend on how perfectly you fulfill your calling. You are loved by God not because of what you do but because of who you are in Christ.

At the same time, remember that God has prepared good works for you to do (Ephesians 2:10). You have a definite purpose, designed by God. This should fill you with hope and motivation, not pressure and anxiety.

Conclusion

The question of “What should I do with my life?” is ultimately a question about identity, purpose, and relationship with God. The answer isn’t found in a specific career path or life plan, but in understanding that you were created by God, for God, and with a purpose that extends far beyond your earthly circumstances.

Live the life God has assigned to you, seeking to glorify him and enjoy him in whatever situation you find yourself. Love God with all your heart and love your neighbor as yourself. Walk in the good works God has prepared for you and trust that he will guide you step by step.

This doesn’t mean life will always be easy or that you’ll always feel certain about every decision. But it does mean that your life has profound meaning and purpose, rooted in the character and love of God himself.

Start where you are and trust that God will guide you as you seek to live for his glory. Your life matters more than you know, and God has wonderful plans for how he wants to use you in his kingdom.

The post What Should I Do With My <em class="algolia-search-highlight">Life</em>? appeared first on Reasons to Believe.

Questions like “Does life have a meaning?” or “What is our real purpose in life?” can be unsettling and difficult to answer. And while it’s natural to ask such questions, the search for meaning often leads people down frustrating dead ends and away from meaningful lives.

Here’s the good news: life’s meaning doesn’t have to be a mystery and your meaningful life doesn’t have to be elusive. What makes life meaningful doesn’t have to be difficult to discover. God reveals life’s purpose to us right from the start.

According to the Bible, we aren’t accidents or products of chance. We are intentional creations, made by a loving God for a purpose that is both deeply personal and meaningful.

When we ask, “What is the meaning of life?”, the Bible reminds us that our value and inherent meaning is rooted in God’s design. We are made in his image, made to know and love him. Everything we do flows from this truth. Our purpose isn’t about chasing momentary satisfactions—it’s about reflecting God’s goodness, loving others, and living with hope.

This hope isn’t wishful thinking or crossing our fingers that things might work out. The word used throughout the New Testament (elpis in Greek) means a confident expectation—a certainty that rests on God’s promises and his faithfulness. It’s the assurance that God is working in and through our circumstances, even the difficult ones. This understanding of hope is central to discovering life’s meaning, and as we explore this further, it’s worth holding onto this definition: hope as confident expectation, not wishful desire. With this kind of hope, we can face challenges with a settled confidence in who God is and what he has promised.

No matter where you’re starting, this is the foundation for true, ultimate meaning. It’s not something you have to earn or figure out alone but a gift from the One who made you.

Meaning Defined

When we talk about “meaning,” we’re referring to the reason something exists, is done, or has value—the purpose or significance behind it. Science can describe life in great detail, like how our bodies work or why ecosystems thrive, but it can’t answer ultimate questions, such as, Is there meaning to life? Understanding meaning goes beyond data and feelings; it’s about discovering the bigger purpose, which requires a worldview that can answer ultimate questions.

True meaning is much more than happiness or satisfaction. It speaks to a deep purpose that endures over time. While achievements or moments of joy may be fulfilling for a while, they’re temporary and can leave us searching for more.

Real meaning comes from understanding why we’re here, knowing that our lives matter, and recognizing our own significance and value.

Meaning That Lasts

Lasting meaning can’t be invented or sustained by our own achievements or changing circumstances. It must come from outside ourselves—specifically, from the One who created us. God-given meaning doesn’t disappear when circumstances change; it doesn’t crumble under pressure. Instead, it holds firm because it’s rooted in an unchanging, everlasting Creator.

When we ask what is the purpose of life according to the Bible, Scripture makes it clear that meaning starts with God. We are made by him and for him, as Colossians 1:16 tells us. That’s an extraordinary statement meaning you and I aren’t just here by happenstance. Our existence is deliberate and meaningful as part of God’s design. Our lives are not the result of randomness. This truth gives every person inherent value that doesn’t need to be earned or justified.

Let’s consider something: in a world without God, meaning becomes entirely subjective. It’s something we invent and it alters depending on trends, opinions, or situations. That kind of meaning is weak and can disappear the moment life gets hard or changes.

But in a world where God exists, meaning is objective, discoverable, and personal. It comes from God who made us and therefore defines our purpose. It’s rooted in the unchanging truth of God’s love and purpose for each of us.

Does Life Have Meaning?

The answer is yes, life has meaning because God exists. The idea that we’re here for a reason isn’t wishful thinking. It flows from the reality  that a Creator brought everything into being with purpose, beauty, and intention.

Nothing is accidental. Everything points to a Creator who infused creation with order and meaning, and that includes your life.

Your existence isn’t an accident or a random coincidence. You are here because God lovingly made you. The Bible tells us that we are “fearfully and wonderfully made” (Psalm 139:14) and created in the image of God (Genesis 1:27). This means we’re here to reflect his character, to know him, to walk in a relationship with him, and to live lives filled with significance.

Every gift, talent, and God-given passion you have was given to you for a reason. Beyond just surviving or pursuing happiness, your life has a unique and lasting purpose that comes directly from God.

Our Questions Point to a Higher Calling

Have you ever wondered why humans ask the questions, “Why am I here?” or “What’s the meaning of life?” Birds don’t ask their purpose. Fish don’t swim around questioning their value. This isn’t just a matter of brain size or intelligence—there’s something deeper at play.

The fact that we’re drawn to these questions reveals a longing for something greater. It’s evidence we’re more than biological organisms simply reacting to our environment. Unlike animals, we’re spiritual beings created for spiritual union with our Creator (1 Corinthians 6:17). These questions are meant to act like a compass, pointing us toward God and the life he’s calling us to live.

What’s the Meaning of Life?

Since we’re created in the image of God, the meaning of our lives is tied to his design. Being made in his image means we have a unique capacity to mirror his character in qualities like love, creativity, justice, and grace. This distinction sets humanity apart from the rest of creation  and gives us purpose far greater than ourselves.

We’re not random combinations of molecules or mere accidents in an indifferent universe. Instead, our lives are intentional and purposeful because they originate from a Creator who designed us with love and care.

Our Purpose in Knowing, Loving, and Reflecting God

At the core of human meaning is relationship. Our purpose is to know, love, and reflect God. But what does that really look like in our day-to-day lives? To understand this fully, we look to Jesus.

Jesus reveals not only the truth about God but also the truth about us. Through his life and teachings, he shows us key truths that shape how we understand our purpose.

We’re Made for Relationship

Jesus reminds us that we’re more than just physical beings. At our foundation, we’re spiritual souls designed for deep intimacy with God and meaningful relationship with others.

He Affirms Our Worth

Through every action he took and every word he spoke, Jesus assured us of our inherent value, calling us to step into a life that is filled with meaning. Worth is something he says we have—think of an insecure child who thinks they’re worthless, yet the parent knows fully well that this isn’t true. Jesus similarly affirms our value, not because of what we do but because of who we belong to.

He Meets Our Deepest Longings

Every human heart craves hope, significance, and belonging. With Jesus, these are completely satisfied and fulfilled through a life of purpose that transcends what this world offers.

He Restores and Renews

Through him, brokenness is healed. Whether it’s a shattered relationship, a wounded heart, or feeling lost in life, Jesus invites us into new life with restoration and renewal.

He Shows Us What It Means to Live a Meaningful Life

Jesus shows us what it truly means to live a life of meaning. His example of love, sacrifice, and confident hope is an invitation to embrace our identity as children of God.

Living Out Meaning

Meaning is experienced in tangible ways. It’s found when we love others, care for creation, and live in an intimate relationship with God. These actions flow naturally when we understand who we are in him.

When we serve, share unexpected kindness, or show compassion, we’re reflecting God’s character. When we spend time drawing close to him in prayer, worship, or reading Scripture, we’re fulfilling a purpose that is both relational and eternal.

Living this out isn’t about us being perfect but about continually aligning our daily lives with the truth of who God is and who we’re created to be.

Purpose That Sustains

What is our real purpose in life? True purpose goes beyond good times and easy paths. It gives us value, direction, and hope, even when life feels overwhelming.

Dead Ends and Finding Meaning

Many people long for meaning but find themselves stuck in common dead ends—like chasing material success. These roads might seem promising at first, but ultimately, none of them lead to lasting fulfillment.

Sometimes, the biggest block to finding meaning is that we never pause to look for it. Modern life becomes a blur of work, entertainment, and endless to-do lists. Busyness and daily routines can keep our minds distracted, or convince us we don’t have the time. We never pause and ask deeper questions like “What is the true meaning of life?” If we never stop to reflect, we are likely to miss the bigger purpose altogether.

Pursuits That Don’t Satisfy

What often becomes another trap is chasing happiness and temporary pleasures. Many look for meaning in achievements, wealth, relationships, substances (alcohol or drugs), or power. While these things might feel rewarding for a moment, in the end, they leave us wanting more or sick or exhausted or empty. They cannot fill the spiritual void in our hearts or satisfy our longing for true purpose and significance.

The Fragile Modern Trend of Defining Your Own Meaning

Modern culture often tells us to “create your own meaning,” trying to pitch this like the next best tech. While this idea sounds freeing, it isn’t grounded in anything that can hold up when you face suffering, loss, or moments of doubt. Real life isn’t plug-and-play, free of viruses, bad actors, technical glitches, or spilled drinks. A meaning you invent yourself won’t provide lasting hope because it has no ultimate authority. Real meaning must come from something bigger—something unchanging and outside ourselves—the original source code: the Creator.

If you’ve tried any of these paths, or looked closely at the lives of the rich and famous, you may realize the “self-made path” fails when real suffering comes and eventually gets too steep to walk. But here’s the good news: meaning isn’t something we have to chase or create; it’s something God invites us into and delights to give freely.

How Do You Find the Meaning of Life?

If you’ve ever felt stuck wondering, “How do you find the meaning of life?”, here’s the truth: you don’t have to figure it out on your own. True meaning is a gift from God, waiting for you to accept it.

God created you intentionally and loves you deeply. When you turn to him, you’ll find an eternal purpose, a God-given value that’s unshakable, and an assured hope—a confident reliance on his promises—that carries you through life’s hardest moments.

Take the First Step

Finding meaning starts with seeking God. Here’s how you can begin:

• Pause and Pray: Take a moment to talk to God. Share your questions, your struggles, and your hopes. It doesn’t have to be formal or “right”—prayer is the beginning of a conversation where true discovery begins.
• Open the Bible: Scripture is a direct message from God to you, filled with reminders of God’s love and purpose for you. It is his primary way of communicating his heart and purpose. Start with passages like 1 John 4:7–12, Romans 5:8, Ephesians 2:4–6, and John 3:16. Notice what they say about how deeply you’re known and loved.
• Reflect and Listen: After you pray and read, spend time in reflection. Ask God to show you the next step in his purpose for your life, and be open and responsive to what he reveals.

These steps are about a relationship with God, not a perfect performance. As you seek him, you begin to see your life through his eyes, and that’s where the meaning of your life starts to become clear.

The Source of True Meaning and Real Purpose

To summarize, true meaning and real purpose aren’t things we create through achievement, accumulation, or willpower. Rather, they’re gifts from God, already prepared and waiting. The meaning of life starts with his relentless love for us—expressed most clearly in Christ Jesus’s death and resurrection—and the specific design God has woven into each of our lives. We were made intentionally, by him and for him, as his deliberate creation.

This purpose isn’t fragile or fleeting like career success, social approval, or personal ambitions that crumble with circumstances. It grounds our lives in value nothing can take away, gives us direction when we face crossroads, and provides confident hope (not wishful thinking, but assured anticipation) even when illness, loss, or uncertainty surrounds us. Knowing that we are loved unconditionally by our Creator and that he has crafted a unique role for each of us in his redemptive plan, provides clarity about our identity, our worth, and the choices before us and peace that sustains us through every circumstance. Through a daily, growing relationship with God, we discover not only our purpose but also experience the deep joy and fulfillment that comes with living it out.

If you’re asking, “What is the meaning of life?” start by looking to the One who made you. God reveals the answers through his Word; through his Son, Jesus Christ, who showed us what God is like; and through the personal relationship he invites each of us into.

The post What Is the Meaning of <em class="algolia-search-highlight">Life</em>? appeared first on Reasons to Believe.

For decades, scientists have wrestled with these questions. Many who look for purely natural explanations believe every living thing can be traced back to a single-celled organism, often called the “Last Universal Common Ancestor,” or LUCA. But this just creates another question: how did that first living cell even come into existence?

Figuring out how life on Earth began—specifically, how a barren planet became filled with microscopic life—isn’t just a point of scientific concern; it has huge implications for each person’s belief system. The evidence points in one of two directions. Either:

1. Life is the result of an unguided, natural process, 
2. Or, it was designed by a Creator.

Many people assume that science and the biblical account in Genesis are at odds. But are they? And do they have to be? Can Christian Scripture and origin-of-life research fit together?

At Reasons to Believe, we hold that both science and Scripture affirm that the origin of life on earth was the result of God’s creative work. To lay out the evidence for this view, we first need to clarify a few key questions:

• What exactly is life?
• What kind of life was first present on Earth?
• What does the latest origin-of-life research tell us?

A thoughtful Christian approach will seriously consider the viewpoints of non-Christian scientists and all relevant scientific facts. While much of the scientific community leans toward a naturalistic explanation for the origin of life on Earth, we’ll see that the evidence presents some major problems for this view. Instead, the history of life points powerfully toward purposeful design and, therefore, a Designer.

How Did Life Begin?

To understand how life began, we first need to agree on what life actually is. While that might sound simple, when we look at the details, it becomes a complex issue.

What Is Life?

Scientists have identified several key characteristics that all life on Earth shares. Life is:

• Organized: It has a defined structure.
• Chemically distinct: It’s different from its nonliving surroundings.
• Homeostatic: It maintains a stable internal balance.

In addition to these traits, living things also:

• Take in and use energy from their environment.
• Respond and adapt to their surroundings.
• Reproduce and experience small-scale changes, or microevolution.

Every living thing reproduces and evolves. Even if you don’t believe that all life evolved from a single common ancestor (macroevolution), it’s clear that all life changes in small ways in response to its environment (microevolution)..

What Does Life Need to Get Started?

For life to exist, it needs the right ingredients and environment. Think of it like building a house—you can’t just dump lumber, nails, and bricks on a lot and expect a home to appear. You need specific materials, a solid foundation, and a carefully ordered plan to bring it all together. In the same way, three of the most critical ingredients for most life on Earth are:

1. water
2. carbon dioxide
3. oxygen

More Than Just Water and Air

While water, CO₂, and oxygen are vital, they’re not the whole story. To build the complex organic compounds found in most or all living organisms, you need other essential elements. These include hydrogen, nitrogen, phosphorus, and sulfur–and, of course, carbon. Other elements like potassium, sodium, and calcium are also important, even if they’re not as abundant.

Abiogenesis: Can Life Arise from Non-Life?

For the first living cells to form, all these elements had to be present in the right amounts and under the right conditions. Many origin-of-life scientists believe that the presence of these key chemical elements provides all the means for the natural development of the first life on Earth. This theory—that life can evolve from nonliving, inorganic matter—is called abiogenesis.

But is it really that simple? Let’s look at what the fossil record tells us about the history of life on our planet.

When Did Life Begin on Earth?

Understanding the timeline of life’s origin can help us appreciate the complexity of Earth’s history. Scientists have uncovered remarkable evidence that reveals just how early—and suddenly—life appeared.

Timeline of Major Life Events

• ~4.566 billion years ago: Earth forms.
• ~4.5 billion years ago: The Moon forms.
• ~3.85 billion years ago: Isotopic evidence for life appears.
• ~3.8 billion years ago: Oceans become permanent, and a stable water cycle is established.
• ~3.5 billion years ago: Stromatolites and microfossils provide evidence of early microbial life.
• ~2.5 billion years ago: Cyanobacteria and other phototrophs contribute to the oxidation of Earth’s atmosphere.
• ~1.9 billion years ago: Microscopic eukaryotes (complex cells) appear.
• ~650 million years ago: Some scientists believe the first land plants arrive.
• ~543 million years ago: The Cambrian explosion occurs, introducing fish and shell-like invertebrates.
• ~444 million years ago: End-Ordovician extinction event occurs, eliminating an estimated 85% of marine species.
• ~372–359 million years ago: Late Devonian extinction events take place in multiple pulses, reshaping marine ecosystems.
• ~520 million years ago: Fossil land plant spores are discovered.
• ~425 million years ago: Vascular plant fossils appear.
• ~346 million years ago: The earliest terrestrial animal fossils are found.
• ~252 million years ago: End-Permian extinction event (“The Great Dying”), the most severe extinction in Earth’s history.
• ~230 million years ago: Dinosaurs emerge.
• ~201 million years ago: End-Triassic extinction event clears ecological space for dinosaur dominance.
• ~155 million years ago: The earliest winged birds appear.
• ~66 million years ago: End-Cretaceous extinction event occurs, most famously wiping out the non-avian dinosaurs.
• ~125 million years ago: The earliest mammal fossils are discovered.
• ~130,000 years ago: Modern humans emerge.

Findings highlight how the discovery of ancient fossils has perplexed origin-of-life researchers and cast doubt on classic evolutionary timelines. While 3.85 billion years of life history might sound like ample time for gradual evolution, the evidence tells a different story: life appears rapidly, stabilizes for long periods, and then new waves of life arise suddenly—often immediately following catastrophic extinction events.

From an old-earth creation perspective, this pattern reflects purposeful stages in Earth’s history, with ecosystems being reset and prepared for increasingly complex life, ultimately culminating in humanity. This progression aligns far more naturally with a biblical explanation of life’s origins than with older naturalistic models that require long, uninterrupted stretches of slow evolutionary change.

Where Did Life Begin?

Where life began on Earth is just as fascinating as when it began. The fossil record points to two especially significant locations: shorelines  and hydrothermal vents.

• Shorelines: Some of the oldest fossils on Earth are found along shorelines and shallow seas in the form of stromatolites.These layered bacterial mats show that microbial communities thrived in the planet’s primeval days and their global distribution reveals that early life was already surprisingly diverse.
• Hydrothermal Vents: Deep-sea vents provided a unique sanctuary for life sheltered from harsh surface conditions and asteroid bombardment. Microfossils in these environments show that complex biological activity was present around the same time as stromatolites.

Recent research highlights just how quickly and widely microbial communities spread, even in Earth’s most inhospitable conditions. As discussed in “What Does the Discovery of Earth’s Oldest Fossils Mean for Evolutionary Models?,” these findings challenge the timeline and expectations of naturalistic evolution, suggesting that the abrupt appearance and variety of early life on Earth isn’t easily explained by the classic models.

With so much evidence pointing to a rapid and global emergence of life, the question remains: how did such complex life begin so early?

How Scientists Study the Origin of Life

Beyond the puzzle of when life appeared, scientists are also trying to figure out how it appeared. A major focus of origin-of-life research is understanding how nonliving (prebiotic) compounds could have assembled  to form the first living cells.

To do this, researchers have developed a three-step experimental approach.

1. Proof of Principle: These experiments aim to demonstrate that a particular chemical or physical process could contribute to one of the steps needed to create life. It’s about showing what’s possible in a lab setting.
2. Mechanism Studies: Once a process is shown to be possible, researchers dive deeper. They study the specific mechanisms behind these chemical changes to understand exactly how they work.
3. Geochemical Relevance: This is the most critical step. Here, scientists try to determine if the processes they’ve demonstrated in the lab could have actually happened on early Earth. In effect, seeing if the processes still work when the lab conditions match the real-world conditions from billions of years ago.

So far, scientists have had success with the first two steps. They’ve identified reliable processes that could, in principle, generate the building blocks of life. They’ve also explored the mechanisms behind these processes.

But here’s the big question: Could any of these carefully controlled lab experiments have occurred naturally on the chaotic, early earth? While we can show that certain chemical reactions are possible, demonstrating that they are relevant to the origin of life on Earth is a much greater challenge.

The Primordial Soup Theory

You’ve probably heard the classic “primordial soup” explanation for how life began. It’s the story many of us learned in school. The idea is that life didn’t just appear all at once but developed through a step-by-step process.

According to this theory, the oceans of early Earth were like a warm, chemical-rich soup. In this primordial soup, simple organic compounds randomly bumped into each other, forming more and more complex molecules. Over vast stretches of time, these nonliving but organic compounds combined in just the right way to create the very first, simple, single-celled organism.

From this initial spark of life, the theory goes, LUCA (the Last Universal Common Ancestor) eventually evolved. This is the single-celled organism from which all other life is thought to have descended.

Does the “Primordial Soup” Theory Hold Up to Science?

While the primordial soup idea is popular, scientists have run into major problems with it. These issues challenge whether this well-known story for how life began could have actually happened.

For example, the classic model assumes Earth’s early atmosphere was “reducing”—meaning rich in hydrogen-based gases that would have helped prebiotic compounds form. However, we now have strong evidence that the early atmosphere was neutral, full of water vapor, nitrogen, and carbon dioxide. This type of atmosphere would have prevented many of the necessary organic compounds from ever forming.

The soup theory itself has other issues. Many of the chemical reactions needed to create the building blocks of life also produce byproducts. These extra chemicals could have stopped later reactions in their tracks or even destroyed the very compounds that had just been made.

Searching for Alternative Routes

Because of these challenges, scientists have proposed alternative theories for the origin of life on Earth.

• Extraterrestrial Delivery: Some suggest that comets or asteroids crashed into Earth, seeding it with the necessary compounds for life—a theory known as panspermia.
• Unique Environments: Others propose that life began in specific locations with unique energy sources, like volcanoes or deep-sea hydrothermal vents. These scenarios aim to find a plausible natural mechanism for creating prebiotic compounds.

The Problem of the Scientist in the Lab

A major hurdle for all origin-of-life experiments is researcher intervention. For a naturalistic origin of life to be plausible, the process must have happened in an unguided way , without any intelligent interference. Scientists trying to recreate these conditions have to prove their experiments could work on the chaotic, messy early earth.

However, researchers often don’t account for their own role. Simple things, like using purified chemicals, temperature control, or removing contaminating byproducts, are standard lab practice. But these actions represent a level of control and foresight that wouldn’t have existed in nature. This kind of tinkering couldn’t happen on early Earth without an intelligent designer.

In their quest to show how life could arise naturally, researchers guide the process toward a desired outcome and unwittingly play the role of a creator.

This leads us to an intriguing question: If creating even the simplest building blocks of a cell requires careful lab conditions and intelligent intervention, is it reasonable to think life began on Earth without a designer?

Why Is There Life on Earth?

After exploring all these scientific puzzles, what are we left with? How did life begin on Earth? While researchers have shown that certain chemical steps toward life are possible in a lab, they haven’t been able to show how these steps could happen in the real world without a scientist’s help. The gap between nonliving chemicals and a living cell remains huge.

The incredible complexity of even the simplest cell, the stunning diversity of the first fossils, and what we know about the hostile early earth all point toward a different conclusion. Both theistic and atheistic scientists acknowledge that complex life appeared suddenly and early in our planet’s history. This sudden arrival demands an explanation that goes beyond simple, unguided processes.

Science and Scripture in Harmony

At Reasons to Believe (RTB), we see overwhelming evidence for design in the history of life. The unexplained complexity and sudden diversity of the first living things point powerfully to God as the Creator. The answer to how life on Earth began seems to require an intentional, intelligent agent—much like origin-of-life experiments require an intelligent scientist.

We hold that the creation accounts in Genesis are historical and can be tested against the record of nature. Part of our testable creation model is to show Christians how the creation account fits with research on the early Earth and origins of life.

Far from contradicting the Bible, modern science gives us more reason to see the evidence for design all around us. Studying how life began actually gives us more reason to believe that God is the Creator and Sustainer of everything that lives.

The post How Did <em class="algolia-search-highlight">Life</em> Begin on Earth? appeared first on Reasons to Believe.

But does science affirm that life begins at conception? Or is this a matter of personal belief? How do we connect scientific views with what the Bible says about when a new life starts?

Let’s explore these questions with an open mind, seeking to understand when life begins and what it means for people in our world today. We’ll examine scientific definitions, biological facts, and biblical insights into the time when a new human being begins and what these views mean for both faith and science.

When Does Life Begin According to Science?

Science confirms that human life begins at conception—the moment when sperm and egg fuse to form a zygote. From that instant, a genetically unique human being comes into existence, complete with distinct DNA.

This process, called fertilization, is widely recognized as the starting point of human life. In fact, 96% of biologists agree that life begins at fertilization, making it the prevailing scientific perspective.

This shared view among scientists is echoed by many OB/GYN physicians who advocate for recognizing the zygote as a new human life from conception. They affirm that the fertilized human egg has all the necessary genetic parts that define a new individual human life. Let’s track that journey from fertilization to birth.

Human Development Journey

From the point of conception, the zygote goes through the development journey to become a fully formed human. Here are some of the major milestones:

Watch the following video to see the journey every human takes from fertilization to birth:

When Does Life Begin Medically?

Dual Patient Approach

The medical field considers both science and ethical responsibility when addressing the question of when life begins. Many medical professionals recognize the pregnant mother and her unborn baby as two distinct patients, highlighting the view of the unborn as a unique individual. This is known as the dual patient approach.

If a concern arises, medical staff are ethically required to consider the health and life of both human beings, both collectively and independently. This dual patient approach by the medical field supports the understanding that all human life begins at conception and each life is important.

What Does the Bible Say About When Life Begins?

According to the Bible, the question of when life begins is answered by considering teachings and principles found in Scripture. Psalm 139:13–16 artfully suggests that life begins in the womb, likely at conception. There, God is intimately involved in creating a person. The Bible affirms that he:

and

This Psalm not only stresses the sanctity of life from its earliest stages but also demonstrates remarkable scientific accuracy that matches well with what science tells us about human development.

Scientific and Scriptural Insights

Further support for the biblical viewpoint stems from studies about the placenta showing the extraordinary design and function needed to support new life. This research showcases what many see as the work of a Creator to protect and nourish an early, distinct life. Consequently, the placenta’s design argues against the idea that a fetus is “just a parasite.”

Instead, it shows the important relationship needed for growth and health. Plus, new findings in neuroscience reveal changes in a woman’s brain during pregnancy, spotlighting the profound biological and emotional changes that happen while caring for new life.

Some people use Genesis 2:7, where God breathes life into Adam, to say life begins with the first breath. But this idea doesn’t align with the full scriptural context.

Instead consider the similarity between Adam’s creation and yours when you were in the womb—God intricately created both up to the point of their first breath. In Luke 1, we read phrases like “the baby leaped in her [Elizabeth’s] womb,” and “the baby in my womb leaped for joy.” These expressions make it clear that what’s in the womb is a human life and there’s no indication that life doesn’t begin until that first breath is drawn.

Addressing Common Objections

When addressing common arguments against the pro-life view, such as why spontaneous abortions occur and the idea that Christians are only pro-birth and not pro-life, it’s important to think about these concerns carefully.

Understanding these sensitive topics will help us to have compassionate and informed conversations, based on both faith and facts.

Especially when we want to make a biblical case against abortion.

This approach honors the Bible’s view of when life begins and invites a deeper appreciation for the amazing scientific process that happens from conception to birth.

When Does “Personhood” Begin?

The debate over when “personhood” begins is a pivotal, often heated topic in discussions about human life. Many pro-choice supporters acknowledge that a human embryo or fetus is a human being, but they argue it is not the same as a human person.

This issue brings up two essential questions: What exactly defines a “person”? and Who decides the criteria for personhood? These questions show how unclear and arbitrary it can be to separate being a person from just being a human.

The Christian View of Personhood

From a Christian point of view, personhood starts at conception. At this point, a human being is, by definition, endowed with the image of God. This concept is known as the imago Dei. It affirms that every human, from the moment their history is set in motion, is a person because they bear this divine image which gives them inherent dignity and worth.

Challenges with Sentience and Self-Awareness

Critics often argue that attributes such as sentience (the ability to experience feelings and sensations) or self-awareness (consciousness) should define personhood. But these ideas often cause more problems.

• The capacity to feel or perceive is difficult to measure and varies widely among individuals.

• Likewise, self-awareness is a trait that develops over time and is not present at birth.

The lack of measurable standards for sentience or self-awareness leads to the question: Why should these characteristics serve as the benchmarks for personhood?

Such traits are not only arbitrary but can leave out individuals who are in certain developmental stages, such as infants or those with cognitive impairments.

Developmental Milestones and Personhood

Developmental milestones like a heartbeat, brain activity, or the ability to live outside the womb are sometimes used as markers of personhood. However, these are just stages of growth and don’t fully encase what it means to be a person. From a Christian viewpoint, personhood is linked to identity as image bearers of God, not on mere capacity for bodily function.

The Importance of Language in Human Value Discussions

The importance of using clear, precise language when talking about human value can’t be overstated. How we define “human” and “person” shapes our ethical and moral views about life and how we protect it. In the biblical worldview, every life is sacred from conception—a position that supports arguments against abortion by highlighting the value inherent to all human beings.

We encourage everyone to think about the language they use when discussing early human life. Important meanings and moral responsibilities arise from words and definitions.

Takeaway

The question of when human life begins according to science and the Bible is often deeply debated but should be likewise deeply researched and considered. Our minds should be open to facts and our hearts willing to reflect on something more than just ourselves and on what it means to be human.

People from all worldviews and backgrounds have thought about when a new human being begins. The majority agree that life starts at conception—not at 8 weeks or 24 weeks, and not at birth, but when the new human DNA is created.

There’s great support for the belief that life begins at fertilization, which in turn has important ethical and moral implications. It makes us think about the value of life from the very start and the need to care for and protect it, even before that life takes its first breath.

When we consider the evidence for when human life begins, we step into a profound truth—life is not an accident, it’s a purposeful gift. Science and Scripture together affirm that every human being is wonderfully made, intentionally created, and endowed with purpose from the very beginning.

The post When Does Human <em class="algolia-search-highlight">Life</em> Begin? appeared first on Reasons to Believe.

What we know is that the periodic table was sparse, initially. The first stars in the universe were comprised of hydrogen, helium, and a trace amount of lithium. The largest of these stars fused hydrogen and helium into heavier elements and scattered these elements into interstellar space when they reached the supernova phase. A second generation of stars formed from the ashes of the first. The largest of these second-generation stars more efficiently generated heavy elements and, when they went supernova, scattered far more heavy-element-enriched ashes into interstellar space. Third-generation stars, like our Sun, formed from the ashes of second-generation stars.

A Consistent Pattern for Most of History
The enrichment of elements heavier than lithium in stars and in the interstellar and intergalactic medium progresses according to a single scaling relationship, one that accurately predicts what astronomers are able to observe in galaxies. As galaxies age, they do, indeed, grow progressively richer in elements heavier than lithium, in keeping with this scaling relationship.

Astronomers have successfully measured the relative abundance of elements in millions of second and third-generation stars. They’ve also determined to a high degree of precision the quantities of heavy elements blasted into interstellar space by supernova eruptions over the past ten billion years. 

However, astronomers’ observations showed hints that this universal scaling relationship connecting star-formation rate, stellar mass, and the abundance of elements heavier than lithium might not match what occurred during the earliest one or two billion years of cosmic history.² These “hints” motivated astronomers to use the JWST to shed light on the star-formation rate, stellar mass distribution, and abundance of elements heavier than lithium in galaxies that formed during the first billion years of cosmic history.   

The JWST Confirms Astronomers’ Hunch
A team of 13 astronomers led by Kaspar Heintz of the Cosmic Dawn Center and the Niels Bohr Institute in Denmark used the JWST to measure the chemical abundances of galaxies just 470–770 million years after the cosmic origin event, aka the big bang.³ They noted that these galaxies proved significantly poorer in heavy elements than would be expected if the universal scaling relationship for older galaxies (formed 2.0–13.8 billion years after the big bang) applied. Elements heavier than lithium were only one-fourth as abundant as the universal scaling relationship would have yielded had it been operating at the same level during that early era. 

Implications for Advanced Life on Earth
The measurements by Heintz’s team indicate that while a scaling relationship does exist in these very early galaxies, it proceeded at a much lower rate than it did from 2 billion years onward in cosmic history. Heintz and his colleagues concluded that “galaxies at this time [previous to the first 800 million years of cosmic history] are still intimately connected with the intergalactic medium and subject to continuous infall of pristine gas, which effectively dilutes their metal abundances.”⁴ (In astronomical terms, elements heavier than lithium are referred to as “metals.”)

The dilution of heavy elements in galaxies that formed during the universe’s first 800 million years suggests that the Earth’s rich endowment of heavy elements is unexpected, by natural processes alone. Our solar system formed when the universe was only 9.22 billion years old. Multiple factors required exquisite fine-tuning for Earth to become so rapidly endowed with the superabundance of heavy elements—the elements without which Earth’s global high-technology civilization would be impossible.⁵ This discovery points to a supernatural Designer who provisioned planet Earth not only for the existence of billions of people but also for spreading the message of his redeeming love to all the world’s people groups in a brief (by astronomical terms) time.

Endnotes

1. Filippo Mannucci et al., “A Fundamental Relation Between Mass, Star Formation Rate and Metallicity in Local and High-Redshift Galaxies,” Monthly Notices of the Royal Astronomical Society 408, no. 4 (November 2010): 2115–2127, doi:10.1111/j.1365-2966.2010.17291.x; Mirko Curti et al., “The Mass-Metallicity and the Fundamental Metallicity Relation Revisited on a Fully T_e-Based Abundance Scale for Galaxies,” Monthly Notices of the Royal Astronomical Society 491, no. 1 (January 2020): 944–964, doi:10.1093/mnras/stz2910; Ryan L. Sanders et al., “The MOSDEF Survey: The Evolution of the Mass-Metallicity Relation from z = 0 to z ~ 3.3,” Astrophysical Journal 914, no. 1 (June 10, 2021): id. 19, doi:10.3847/1538-4357/abf4c1.
2. P. Troncoso et al., “Metallicity Evolution, Metallicity Gradients, and Gas Fractions at z ~ 3.4,” Astronomy & Astrophysics 563 (March 6, 2014): id. A58, doi:10.1051/0004-6361/201322099; M. Onodera et al., “ISM Excitation and Metallicity of Star-Forming Galaxies at z ~ 3.3 from Near-IR Spectroscopy,” Astrophysical Journal 822, no. 1 (May 1, 2016): id. 42, doi:10.3847/0004-637X/822/1/42.
3. Kasper E. Heintz et al., “Dilution of Chemical Enrichment in Galaxies 600 Myr after the Big Bang,” Nature Astronomy2023 (September 21, 2023), doi:10.1038/s41550-023-02078-7.
4. Heintz et al., “Dilution of Chemical Enrichment,” p. 1.
5. I describe many of these factors in my books Improbable Planet (Grand Rapids, MI: Baker Books, 2016) and Designed to the Core (Covina, CA: RTB Press, 2022).

The post Universe’s Chemical Enrichment Designed for <em class="algolia-search-highlight">Life</em> appeared first on Reasons to Believe.

Characteristics of K2-18b
K2-18b is a sub-Neptune planet (one with a radius 1.4–3.0 times Earth’s radius and a mass greater than Earth’s but less than Neptune’s) orbiting an M3 red dwarf star 124 light-years away. K2-18b orbits its star every 32.9 days at a distance of just 40% of Mercury’s orbital distance from the Sun. However, because this exoplanet’s host star is so much smaller and colder than the Sun, it’s possible that K2-18b’s surface temperature permits the existence of liquid water there. 

K2-18b is 8.6 times more massive than Earth with a radius 2.6 times larger than Earth’s. Thus, the planet’s density amounts to only 2.67 grams per cubic centimeter. By comparison, Earth’s density is 5.5134 grams per cubic centimeter.

The proximity of K2-18b to its host star means that it’s either tidally locked (with one hemisphere always facing the host star) or, like Mercury, it orbits in a spin-orbit resonance (rotating on its axis 2 or 3 times for every 1 or 2 orbital revolutions).² In either case, one hemisphere of K2-18b faces its host star for at least 16 Earth days at a time. 

What Level of Certainty?
Through the use of JWST’s spectrometers, a team of six astronomers led by Nikku Madhusudhan positively detected methane in K2-18b’s atmosphere.³ The methane signal was at the 5-sigma level (five standard deviations, or about five times greater than the background noise). In other words, the level of certainty that methane exists in the planet’s atmosphere is 99.99997%. In the physical science literature, a detection is recognized as valid only if the signal is at least 5 sigma, or 5 times above, the background noise.

Madhusudhan’s team also detected carbon dioxide in K2-18b’s atmosphere, but only at the 3-sigma level. Their search for water (H₂0), ammonia (NH₃), carbon monoxide (CO), and hydrogen cyanide (HCN) revealed no evidence for the presence of any of these molecules. However, they were able to establish upper limits for the abundance of water, ammonia, carbon monoxide, and hydrogen cyanide, and they were low.

What generated all the excitement was the team’s “potential” detection of dimethyl sulfide (CH₃SCH₃) and chloromethane (CH₃Cl) (see figure 1). In reality, the detections were marginal, at best. For dimethyl sulfide, the detection was only at the 1-sigma level, and for chloromethane it was even lower.

Figure 1: Spacefill Models of Dimethyl Sulfide (top) and Chloromethane (bottom)
Credit: public domain

The community of astronomical researchers remains highly skeptical of the Madhusudhan team’s “detection,” especially that of dimethyl sulfide. They’re reminded of the sensational claims in 2020 that phosphine (PH₃) had been found in the upper atmosphere of Venus. That announcement generated more than 4,700 news stories around the world. Then, within just a few months, the claim had to be withdrawn in light of follow-up observations that failed to detect any phosphine at all.⁴ To their credit, Madhusudhan and his colleagues referred to their discovery as “tentative” and recommended more sensitive spectral measurements of K2-18b’s atmosphere.

Definitive Biosignatures?
Dimethyl sulfide is the simplest thioether. It is produced naturally on Earth by certain marine phytoplankton, algae, and corals. These marine organisms release about 10 million tons of dimethyl sulfide into Earth’s atmosphere annually. Industrial activity and chemistry occurring at the interface between the atmosphere and the ocean⁵ produce additional amounts of this molecule, but at trivial levels by comparison with the amount generated by marine organisms. Thus, astronomers figure that the detection of a large quantity of dimethyl sulfide in a planet’s atmosphere would be a reliable indicator of the likelihood that marine life exists on that planet.⁶   

On Earth, the quantity of dimethyl sulfide in the atmosphere is a benefit to advanced life. Sunlight in the atmosphere causes it to decompose into sulfur aerosols that serve as cloud condensation nuclei, the quantity and distribution of which determine the rate and location of rainfall and snowfall. Sulfur aerosols in Earth’s atmosphere also regulate Earth’s radiation balance.

Although most of the chloromethane in Earth’s atmosphere comes from organisms, this molecule does not serve as a reliable biomarker for life in other locations. Astronomers have detected chloromethane in the coma (surrounding cloud) of comet 67P/Churyumov-Gerasimenko and in the gas around the protostar IRAS 16293–2422, where physical and chemical conditions rule out the possibility of life.⁷ They have also demonstrated that there are abiotic chemical pathways for the production of chloromethane.

It has become increasingly clear to astronomers that they cannot rely on a single biosignature as proof of life’s presence. If life truly exists on an exoplanet, its presence will yield multiple biosignatures all at strong levels.

Is K2-18b a Viable Candidate to Host Life?
Several factors raise skepticism about K2-18b as a candidate for life. Previously posted articles explain why the characteristics of M-dwarf stars would rule out the possibility of life’s existence on any planet in their orbit.⁸

The Mudhusudhan team based their speculation about possible life on K2-18b on the hypothesis that a thin, hydrogen-dominated atmosphere overlays a thick ocean of liquid water. Such a thin atmosphere would mean that the atmospheric greenhouse effect would be too weak to turn any of K2-18b’s liquid water into steam. It also might explain why the team detected no water in the planet’s atmosphere. If K2-18b is, indeed, covered by a very thick ocean of liquid water several thousand kilometers deep, that could well account for the planet’s low bulk density. According to the Mudhusudhan team’s hypothesized scenario, K2-18b could be termed a “Hycean” planet—representing a whole new category of exoplanets claimed as prospective candidates to support life. (The word Hycean is a blend of hydrogen and ocean).

The determination that K2-18b has a thin, rather than a thick, hydrogen-dominated atmosphere is based on detection of an abundance of both methane and carbon dioxide in the exoplanet’s atmosphere, and an undetectably low (or nonexistent) quantity of ammonia and carbon monoxide. The team’s spectral observations established only that methane is abundant in K2-18b’s atmosphere. 

Given that water is the third most abundant molecule in the universe (after H₂ and H₃), I would agree that K2-18b could be a Hycean planet. However, to claim Hycean planets as candidates for life support is to ignore some significant realities. The greatest problem with the “oceanworld” model is this: the pressure at the bottom of an ocean as deep as several hundred kilometers or more is great enough to turn that liquid water into ice.⁹  

Figure 2 illustrates a cross section of the K2-18b Hycean model. Note that an ice barrier separates the planet’s liquid water from its rocky material. This barrier, which would be permanent, rules out the operation of chemical processes necessary for both the origin of life and the survival of life. An additional challenge emerges from research on ocean acidification. The team of Amit Levi and Dimitar Sasselov has demonstrated that the pH of such an ocean would range from 2 to 4, in other words, from the acidity of pure lemon juice to the acidity of pure tomato juice.¹⁰ Earth’s ocean water, by contrast, is slightly basic, with a pH of 7.5–8.4.

Figure 2: Hycean Planet (Waterworld) Cross Section
Credit: Hugh Ross    

One must also note the fact that K2-18b orbits so closely to its host star that its rotation period roughly equals its revolutionary period, equivalent to at least 16 Earth days. With such a lengthy rotation period, one hemisphere of K2-18b will be blisteringly hot while the opposite hemisphere remains frigidly cold. The day-night temperature difference would be several hundred degrees Celsius. Such a huge difference rules out the survival of any conceivable physical life form.

Life As We Know It?
Of course, I’m assuming, here, that extraterrestrial life must be like life as we know it on Earth. Some people assert that a consideration of life as we don’t know it could yield much more optimistic estimates for the probability of extraterrestrial life. However, my only assumption is that extraterrestrial physical life must be carbon-based, and this assumption is based on well-established research.

Decades ago, biochemists considered the theoretical possibility of physical life-forms based on silicon, boron, or arsenic, for example, as substitutes for carbon. Their study led to the conclusion that carbon is the only element in the periodic table possessing the chemical bonding stability and the chemical bonding complexity that even the simplest conceivable physical life-form would require. Therefore, all life constrained by the physics and dimensions of the universe must be carbon-based.

Hycean Worlds as Viable Candidates for Life?
So far, astronomers have discovered and determined the characteristics of 5,504 planets orbiting stars other than the Sun.¹¹ Catalogs of such planets reveal that sub-Neptune planets orbiting close to their host stars are relatively common. Such planets comprise about 5% of the 5,504 known and measured exoplanets.

A sizable fraction of sub-Neptune planets may, indeed, be Hycean worlds. The quantity of liquid water on these planets leads astronomers and laypeople, alike, to view them as promising candidates to host life. What dashes this hope, however, is the fact that too much liquid water on a planet renders the planet uninhabitable. In view of its mass and distance from the Sun, Earth is habitable because it is appropriately water-poor. Its abundance of water is at the just-right (relatively low) level to support a broad diversity and abundance of life.

Enthusiasm for the possibility of life on Hycean worlds is largely driven by an unwarranted focus on the liquid water habitable zone within a planet’s orbit around its host star. This particular zone is the broadest of the dozen or more known habitable zones within a planetary orbit.¹² For a planet to accommodate life of any complexity for any length of time it must reside simultaneously in all these known habitable zones. None of the sub-Neptune planets discovered to date resides in as many of three of these planetary habitable zones simultaneously. Of 5,512 known planets, only Earth resides in more than three.

While I would not claim that the Bible rules out the possibility of God’s creating life on other planets,¹³ I can affirm that astronomers’ extensive observations of galaxies, stars, and planets indicate the unlikelihood that God did. As astrophysicist Neil de Grasse Tyson famously declared, once one ventures beyond Earth, “The universe is a deadly place.”¹⁴

Endnotes

1. Some examples include Ariana Garcia, “NASA Scientists May Have Discovered Planet That Smells Like the Beach,” Microsoft News (September 22, 2023); Julia Robinson, “Explainer: Has Life Been Discovered on an Exoplanet?” Chemistry World (September 15, 2023); Jackie Appel, “We Just Found a Molecule on Another World . . . and Only Living Organisms Can Produce It,” Popular Mechanics (September 15, 2023).
2. Mark A. Wieczorek et al., “Mercury’s Spin-Orbit Resonance Explained by Initial Retrograde and Subsequent Synchronous Rotation,” Nature Geoscience 5 (January 2012): 18–21, doi:10.1038/ngeo1350.
3. Nikku Madhusudhan et al., “Carbon-Bearing Molecules in a Possible Hycean Atmosphere,” (September 11, 2023), arXiv:2309.05566v1. The paper has been accepted for publication in the Astrophysical Journal but the peer review process is still underway.
4. Hugh Ross, “Life Signature in Venus’s Atmosphere: Genuine or Not?” Today’s New Reason to Believe (blog), Reasons to Believe, March 29, 2021; I. A. G. Snellen et al., “Re-analysis of the 267 GHz ALMA Observations of Venus. No Statistically Significant Detection of Phosphine,” Astronomy and Astrophysics: Letters 644 (December 20, 2020): id. L2, doi:10.1051/0004-6361/202039717.
5. Gordon A. Novak and Timothy H. Bertram, “Reactive VOC Production from Photochemical and Heterogeneous Reactions Occurring at the Air-Ocean Interface,” Accounts of Chemical Research 53, no. 5 (May 5, 2020): 1014–1023, doi:10.1021/acs.accounts.0c00095.
6. Sara Seager, W. Bains, and R. Hu, “Biosignature Gases in H2-Dominated Atmospheres on Rocky Planets,” Astrophysical Journal 777, no. 2 (November 10, 2013): id. 95, doi:10.1088/0004-637X/777/2/95.
7. Edith C. Fayolle et al., “Protostellar and Cometary Detections of Organohalogens,” Nature Astronomy 1 (October 2017): 703–708,  doi:10.1038/s41550-017-0237-7.
8. Hugh Ross, “‘Electric Wind’ Becomes 9th Habitable Zone,” Today’s New Reason to Believe (blog), Reasons to Believe, July 4, 2016; Hugh Ross, “Overlap of Habitable Zones Gets Much Smaller,” Today’s New Reason to Believe (blog), Reasons to Believe, December 27, 2016; Hugh Ross, “Inhabitability of Planets Orbiting Red Dwarfs,” Today’s New Reason to Believe (blog), Reasons to Believe, July 30, 2017; Hugh Ross, “Tiny Habitable Zones for Complex Life,” Today’s New Reason to Believe (blog), Reasons to Believe, March 4, 2019; Hugh Ross, “Do Superhabitable Planets Exist?” Today’s New Reason to Believe (blog), Reasons to Believe, November 2, 2020; Hugh Ross, “Red Sky Paradox Points to Rarity of Earth’s Life,” Today’s New Reason to Believe (blog), Reasons to Believe, August 23, 2021.
9. A. Levi, D. Sasselov, and M. Podolak, “Structure and Dynamics of Cold Water Super-Earths: The Case of Occluded CH₄ and Its Outgassing,” Astrophysical Journal 792, no. 2 (September 10, 2014): id. 125, doi:10.1088/0004-637X/792/2/125; A. Levi and D. Sasselov, “Partitioning of Atmospheric O₂ into High-Pressure Ice in Ocean Worlds,” Astrophysical Journal 926, no. 1 (February 10, 2022): id. 72, doi:10.3847/1538-4357/ac4500.
10. A. Levi and D. Sasselov, “A New Desalination Pump Helps Define the pH of Ocean Worlds,” Astrophysical Journal 857, no. 1 (April 10, 2018): id. 65, doi:10.3847/1538-4357/aab715.
11. Exoplanet TEAM, “Extrasolar Planet Catalog,” The Extrasolar Planets Encyclopaedia, accessed September 21, 2023. 
12. Hugh Ross, Designed to the Core (Covina, CA: RTB Press, 2022), 133–148, 171–181.
13. Hugh Ross, “Does the Bible Say We’re Alone in the Universe?” Today’s New Reason to Believe (blog), Reasons to Believe, May 2, 2022.
14. “Neil deGrasse Tyson, (caught on camera): The Universe Is Trying to Kill You,” interview outtake, Big Think Mentor, June 27, 2013.

The post Have Astronomers Found <em class="algolia-search-highlight">Life</em> on Planet K2-18b? appeared first on Reasons to Believe.

Or have you ever felt all alone—isolated, lonely, and seemingly without family and close friends? Sometimes these feelings are brought on by divorce, bereavement, depression, or even a pandemic.

Sound mental health depends upon the ability to effectively cope with life’s problems. How can Christians deal with such issues? I’ll briefly address the problem of pain and suffering from the aspect of a believer in Christ.

Christians and the Challenges of Life
The Christian life consists of living a life of faith, hope, and love by God’s grace in light of what he has revealed about himself and the saving relationship we have with him.

When I go through tough times I take my concerns to God in prayer but I also ask other Christians to pray for me. On some occasions I’ve sought advice from my pastor and professional counselors I know. Christians should not hesitate to seek the help of qualified professionals when we go through difficulties.

Also, when facing hard times I seek to apply my theology to my situation. Here’s an example of biblical truth that’s helped me in my devotional time.

Many of historic Christianity’s greatest theologians have identified the Psalms as one of their favorite Old Testament books (e.g., Augustine, Luther, Calvin). It’s also one of my favorites, with Psalm 139 in particular possibly topping the list. Scholars generally view this psalm as consisting of four poetic stanzas or paragraphs (with the specific verses numbered accordingly: 1–6, 7–12, 13–18, 19–24).¹ I appreciate this psalm because it is profoundly comforting. Its general theme is “God’s intimate knowledge of his people.”²

Psalm 139:1–6: God Knows All about Us
¹ You have searched me, Lord, and you know me. ² You know when I sit and when I rise; you perceive my thoughts from afar. ³ You discern my going out and my lying down; you are familiar with all my ways.⁴ Before a word is on my tongue you, Lord, know it completely. ⁵ You hem me in behind and before, and you lay your hand upon me. ⁶ Such knowledge is too wonderful for me, too lofty for me to attain.

This part of the psalm reveals that God has a detailed and deeply personal knowledge of everything about us, including our thoughts, words, and actions. We cannot evade the Creator and Redeemer’s infinite awareness of each of us. Such realization of God’s awesome knowledge can seem intimidating. Yet verse five’s “you lay your hand upon me” reflects a gentle, caring concern on the Lord’s part. As the Expository Bible Commentary notes: “The placement of the divine hand signifies protection and blessing.”³ The psalm writer (thought to be Israel’s King David) responds in verse six with an expression reflecting the finite creature’s astonishment and incomprehensibility concerning God’s limitless knowledge.

In the context of our suffering, this psalm assures us that the Lord knows, understands, and cares about our challenging conditions or circumstances. In light of how these poetic verses in Psalm 139 reflect God’s attribute of omniscience (all knowledge), theologian John Jefferson Davis offers this devotional application:

“God knows his children intimately. Even the very hairs of their head are numbered (Mt 10:30). This pervasive knowledge on God’s part is intended to be a comfort and source of security to his people.”⁴

Takeaway
As believers in Jesus Christ we don’t want to suffer or see the ones we love suffer, but pain and sorrow are part of the human condition in a fallen world. Concerning our mental and spiritual health, Christian psychologists Mark Cosgrove and James Mallory offer the following:

“Individuals need to take part in spiritual realities by entering into an ongoing relationship with a loving God. It is apparent in the Bible that God wants people to live with a certain mindset in order to know full mental and spiritual health.”⁵

Psalm 139 reveals that our Creator-Redeemer God has a plan for his children’s well-being, and we can be confident of his love and providential care even in the midst of pain and suffering.

Reflections: Your Turn 
What spiritual practices do you engage in when going through difficult times?

Resources

• Geoffrey Grogan, Prayer, Praise & Prophecy: A Theology of the Psalms

• The Expositor’s Bible Commentary (Vol. 5): Psalms, Proverbs, Ecclesiastes, Song of Songs 

Endnotes

1. The NIV Study Bible, Kenneth Barker, gen ed. (Grand Rapids, MI: Zondervan, 1995), 925.

2. ESV Study Bible (Wheaton, IL: Crossway Bibles, 2008), 1116.

3. The Expositor’s Bible Commentary (Vol. 5): Psalms, Proverbs, Ecclesiastes, Song of Songs (Grand Rapids, MI: Zondervan, 1991), 836.

4. John Jefferson Davis, Handbook of Basic Bible Texts: Every Key Passage for the Study of Doctrine & Theology (Grand Rapids, MI: Zondervan, 1984), 28.

5. Mark P. Cosgrove and James D. Mallory, Jr., Mental Health: A Christian Approach (Grand Rapids, MI: Zondervan, 1977), 40.

The post God’s Care Amid <em class="algolia-search-highlight">Life</em>’s Challenges appeared first on Reasons to Believe.

For advanced life to exist on a planet, that planet must reside simultaneously in 16 habitable zones, which include the known extragalactic habitable zone, the two known galactic habitable zones, and the 13 known planetary habitable zones. I have written extensively about these habitable zones in my books, Improbable Planet and Designed to the Core.¹

To date, astronomers have discovered and determined at least some of the orbital and physical features of 5,373 planets.² Many of these planets reside in the known extragalactic and galactic habitable zones and the liquid water planetary habitable zone, but only one resides in all 16 of the known habitable zones. 

Planet-Moon System Habitability Criteria
Since the 1990s, astronomers have understood that advanced life is possible only on a rocky planet that is orbited by a moon that is a substantial fraction of the planet’s mass. In the case of the Earth-Moon system, the Moon’s mass is 1.23% Earth’s mass.³ This small percentage may not seem like much, but relative to its host planet’s mass the Moon is 52 times larger than any other known moon, namely Titan.

It takes the extraordinarily large moon-planet mass ratio of the Earth-Moon system to stabilize Earth’s rotation axis tilt. Earth’s rotation axis tilt regularly oscillates between 22.04 and 24.50 degrees. By comparison, Mars’s rotation axis tilt varies from 0–60 degrees. Thanks to Earth’s stable rotation axis tilt, our climate is sufficiently stable to permit the existence of advanced life.

The combination of the Moon’s high mass relative to Earth and its proximity (see figure) causes powerful lunar tidal forces on Earth. These tidal forces recycle life-critical nutrients all along the continental shelves, thereby enabling the biomass and biodiversity that advanced life needs.

Figure: Earth-Moon System
Earth-Moon separations and sizes are to scale. Diagram credit: Hugh Ross 

The Moon’s tidal forces have operated for the past 4.47 billion years⁴ to gradually slow down Earth’s rotation rate from just 3–4 hours per day to the present 24 hours per day. A 24-hour rotation rate is ideal for advanced life, whereas either a 23-hour or a 25-hour rotation rate would be a huge problem.⁵ Thanks to the Moon’s highly fine-tuned mass and rate of orbital recession from Earth, Earth attained a 24-hour rotation rate at the same time in solar system history when the Sun’s luminosity became stable enough for advanced life to exist.⁶  

The Moon also rescued Earth from losing all of its atmosphere and surface water. During its first 700 million years, the Sun was blasting out particles and radiation that normally would have sputtered away all Earth’s atmosphere and water. Two of the Moon’s features prevented that outcome. The Moon’s strong magnetic field and proximity to Earth allowed its magnetic field to couple with Earth’s magnetic field. Both the early Earth and early Moon possessed hot liquid iron cores and were sufficiently close to one another that their mutual tidal force exertion circulated the liquid iron in their cores. This circulation generated powerful magnetic fields surrounding both bodies. Nothing less than the coupling together of the two magnetospheres would have preserved Earth’s atmosphere and its surface oceans.⁷    

Lunar Doomsday
Thanks to Earth’s amazingly fine-tuned Moon, an abundance of diverse life has thrived for 3.8 billion years on Earth’s surface. The Moon’s exquisitely designed features have protected advanced life and global civilization. However, the Moon will not always be a protector of life on Earth. A lunar doomsday is coming—but the Sun is on schedule to precede the Moon with its own doomsday.

Since its formation 4.47 billion years ago, the Moon has been slowly spiraling away from Earth. Its orbital distance from Earth increases by 3.82 ± 0.07 centimeters/year.⁸

Earth’s tidal forces exerted on the Moon have resulted in the Moon becoming tidally locked. Those tidal forces have slowed the Moon’s rotation rate to equal its revolution rate, causing one hemisphere of the Moon to always face Earth. At the same time, the Moon’s tidal forces exerted on Earth are slowing down Earth’s rotation rate. Eventually, Earth will become tidally locked to the Moon, but not for another 40–50 billion years. When that occurs, the Moon will stop spiralling away from Earth and begin to spiral inward. This inward spiral will result in the Moon crashing into Earth—the ultimate doomsday scenario for life. 

However, long before this catastrophe occurs, the Sun will become a red giant star and incinerate both the Moon and Earth. This incineration event will occur in about another 4.5 billion years.  

Unstable Moons in Exoplanet Systems
Another rare feature of Earth’s Moon is that it has been dynamically stable over the entire period of Earth’s conceivable habitability. University of California at Los Angeles theoretical physicist Bradley Hansen, in a recently published paper, has demonstrated three ways that it may be common for large moons orbiting rocky planets in extrasolar planetary systems to be dynamically unstable.⁹  

The rocky extrasolar planets discovered so far orbit their host stars at distances considerably smaller than Earth’s orbital distance from the Sun. Hansen first cites research that establishes that the rate of tidal evolution of planet-moon systems is inversely proportional to the planet’s orbital distance from its host star, to the host star’s mass, and to the planet’s mass.¹⁰

Second, Hansen cites other research showing that it takes a collision between two or more rocky planets to form a large moon that subsequently orbits a rocky planet.¹¹ Such a collision causes the planet to rotate more rapidly than it did before the collision. However, if the subsequent planetary rotation rate is too low, then the planet will extract angular momentum from its moon’s orbit, causing the moon to spiral inward and relatively quickly collide with its planet. On the other hand, if the planet’s subsequent rotation rate is sufficiently high, then angular momentum will be transferred to the moon, resulting in the moon spiraling outward and escaping the gravitation grip of its planet. For situations similar to the Earth-Moon system, where the host star exerts a substantial tide on the planet, the outward spiraling of the moon eventually reverses, resulting in a planet-moon collision. 

Third, Hansen calculated that even in the case where the large moon escapes the gravitational grip of its planet, a collision of the moon with its original host planet is highly likely. When the moon spirals outward to the point where it no longer orbits its planet, it nonetheless continues to share the planet’s orbit about their host star. As such, the escaped moon will make repeated close encounters with its planet. Hansen demonstrated that “nearly all of the freed exomoons will eventually collide with the original host planet.”¹²        

Tabby’s Star
What effect would planet-moon collisions have on another star like the Sun? In 2015, the F-type main-sequence star, KIC 8462852, investigated by a team of astronomers led by Tabetha Boyajian, became a media sensation.¹³ Unusual luminosity fluctuations in the star that included dimming of up to 22% caused astronomers and laypeople alike to speculate that an extraterrestrial intelligent civilization had constructed a Dyson sphere around the star. This speculation garnered KIC 8462852 the nickname, Tabby’s star. 

A Dyson sphere is a megastructure, hypothesized by physicist Freeman Dyson, encompassing a star that captures a large percentage of the star’s power output and transforms that power into a useful energy source for an intelligent civilization. Follow-up observations of KIC 8462852 extending through the end of 2017, made by Boyajian and her team showed wavelength-dependent dimming consistent with huge clouds of dust periodically blocking out some of KIC 8462852’s light, but not with an opaque alien megastructure, which would equally block out all wavelengths of light.¹⁴    

Hansen’s study provides a reasonable explanation for KIC 8462852’s luminosity variations. One or more moons colliding with planets orbiting stars like KIC 8462852 would generate huge clouds of dust orbiting such stars that would well explain the observed dimming variations.  

Yet More Lunar Design
As Hansen explained, collisions between rocky planets and their large moons may sterilize otherwise habitable planets. Hansen has added yet another habitability requirement for planets. Advanced-life-habitable planets must be rocky planets that simultaneously reside in all 13 known planetary habitable zones and possess a moon that is about 1% the planet’s mass where that moon remains in a stable orbit about the planet for a long enough time period for advanced life to exist. 

The probability for all these requirements to be met without invoking supernatural, super-intelligent Agency is absurdly remote.¹⁵ Thanks to Hansen’s research, the case for a supernatural, super-intelligent Agent has become scientifically stronger, demonstrating that the more scientists learn about nature the more evidence they uncover for the handiwork of a personal God.    

Endnotes

1. Hugh Ross, Improbable Planet (Grand Rapids: Baker, 2016), 81–93; Hugh Ross, Designed to the Core (Covina, CA: RTB Press, 2022), 132–181; Hugh Ross, “Complex Life’s Narrow Requirements for Atmospheric Gases,” Today’s New Reason to Believe (blog), Reasons to Believe, July 1, 2019; Hugh Ross, “Tiny Habitable Zones for Complex Life,” Today’s New Reason to Believe (blog), Reasons to Believe, March 4, 2019; James Green et al., “When the Moon Had a Magnetosphere,” Science Advances 6, no. 42 (October 14, 2020): id. eabc0865, doi:10.1126/sciadv.abc0865.
2. Eoxplanet TEAM, “Catalog,” The Extrasolar Planets Encyclopaedia, accessed April 24, 2023, http://exoplanet.eu/catalog/.
3. Mark A. Wieczorek et al., “The Constitution and Structure of the Lunar Interior,” Reviews in Mineralogy and Geochemistry 60, no. 1 (January 1, 2006): 221–364, doi:10.2138/rmg.2006.60.3.
4. Robin M. Canup et al., “Origin of the Moon,” (March 2, 2021): 13–14, arXiv:2103.02045. This paper is a book chapter in New Views of Moon II, which will be published as special volume of Reviews in Mineralogy and Geochemistry.
5. Ross, Designed to the Core, 173; Dave Waltham, “Anthropic Selection for the Moon’s Mass,” Astrobiology 4, no. 4 (December 20, 2004): 460–461, doi:10.1089/ast.2004.4.460.
6. Ross, Designed to the Core, 117–129.
7. Green et al., “When the Moon Had a Magnetosphere; Hugh Ross, “Earth-Moon Coupled Magnetosphere Paved the Way for Life,” Today’s New Reason to Believe (September 20, 2021); Hugh Ross, “Moon’s Early Magnetic Field Made Human Existence Possible,” Today’s New Reason to Believe (November 16, 2020).
8. J. O. Dickey et al., “Lunar Laser Ranging: A Continuing Legacy of the Apollo Program,” Science 265, no. 5171 (July 22, 1994): 482–490, doi:10.1126/science.265.482.
9. Bradley M. S. Hansen, “Consequences of Dynamically Unstable Moons in Extrasolar Systems,” Monthly Notices of the Royal Astronomical Society 520, no. 1 (March 2023): 761–772, doi:10.1093/mnras/stac2847.
10. Takashi Sasaki, Jason W. Barnes, and David P. O’Brien, “Outcomes and Duration of Tidal Evolution in a Star-Planet-Moon System,” Astrophysical Journal 754, no. 1 (July 20, 2012): id. 51, doi:10.1088/0004-637X/54/1/51; Takashi Sasaki and Jason W. Barnes, “Longevity of Moons around Habitable Planets,” International Journal of Astrobiology13, no. 4 (October 2014): 324–336, doi:10.1017/S1473550414000184; Armen Tokadjian and Anthony L. Piro, “Impact of Tides on the Potential for Exoplanets to Host Exomoons,” Astronomical Journal 160, no. 4 (October 6, 2020): id. 194, doi:10.3847/1538-3881/abb29e.
11. Robin M. Canup, “Lunar-Forming Impacts: Processes and Alternatives,” Philosophical Transactions of the Royal Society A 372, no. 2024 (September 13, 2014): id. 20130175, doi:10.1098/rsta.2013.0175; Canup et al., “Origin of the Moon.”
12. Hansen, “Consequences of Dynamically Unstable Moons,” 762.
13. Tabetha S. Boyajian et al., “Planet Hunters IX. KIC 8462852—Where’s the Flux?” Monthly Notices of the Royal Astronomical Society 457, no. 4 (April 21, 2016): 3988–4004, doi:10.2093/mnras./stw218.
14. Tabetha S. Boyajian et al., “The First Post-Kepler Brightness Dips of KIC 8462852,” Astrophysical Journal Letters 853, no. 1 (January 20, 2018): id. L8, doi:10.3847/2041-8213/aaa405.
15. Independent of Hansen’s study, I demonstrate this remote possibility in my books, Improbable Planet and Designed to the Core.

The post Moons: <em class="algolia-search-highlight">Life</em>'s Friends or Foes? appeared first on Reasons to Believe.

My Answer: All living cells contain proteins, DNA, and RNA. Without proteins, DNA, and RNA physical life is not possible. Proteins are long chains of amino acids and DNA and RNA molecules are long chains of nucleobases. Ribose sugars are required to link together the nucleobases.

Proteins cannot be assembled unless all the amino acids are either 100% left-handed or 100% right-handed. Similarly, RNA and DNA molecules cannot be assembled unless all the ribose sugars are either 100% left-handed or 100% right-handed. Homochirality is where all the chiral molecules in a sample manifest a single-handed configuration.   

At the 2017 ISSOL (International Society for the Study of the Origin of Life) conference at the University of California San Diego, which both Fazale Rana and I attended, it was acknowledged by all speakers who addressed homochirality that it was a huge problem for the origin of life. Under highly controlled laboratory conditions, as opposed to real-life naturalistic conditions, biochemists are able to preferentially destroy right-handed amino acids at a faster rate than left-handed amino acids. By this means, in a few of the many experiments conducted, samples that were 80% left-handed were achieved. However, when the biochemists extrapolated their results, they discovered that 100% of the amino acid samples would be destroyed long before homochirality would ever be achieved.

• For more on the homochirality problem see the book by Fazale Rana and me, Origins of Life

• Also, see these free online articles: “Homochirality: A Big Challenge for the Naturalistic Origin of Life,” and “Natural Source of Life’s Homochiral Molecules?”

The post Is Homochirality a Problem for the Origin of <em class="algolia-search-highlight">Life</em>? appeared first on Reasons to Believe.