Human Limitations

Don’t die. That’s the simple mission statement of Bryan Johnson, tech entrepreneur, who is on a mission to extend his life as long as possible. He is not alone in this quest. In fact, the preoccupation with longevity is everywhere. Entrepreneurs are using AI to crack the longevity code. Cities are vying to be the new “longevity hubs.”

Most of the longevity movement is not really about immortality but rather about extending life and limiting the damaging effects of aging. Of course, we all want longevity. The danger of Johnson’s obsessive approach is spending so much time trying to extend your life that you never quite get around to living it.

Indeed, keeping death close—even while pushing it as far into the future as we can—has many lessons to teach us about life…. Death can help us focus our attention on living our best life, because there’s nothing that can teach us more about how to live life than death. Death is the most universal experience, yet we will do anything and everything we can to curtain it off, to avoid dealing with the only plot twist that we know for sure will be in our story’s last act.

Here lies the crux of the error of those that see human beings solely as material beings, they have confused an immortal soul with an immortal body. As the philosopher Pierre Teilhard de Chardin put it, “We are not human beings having a spiritual experience. We are spiritual beings having a human experience.”

When we don’t allow death into our lives, we lose the clarity, perspective, and wisdom that only death can bring. That’s why psychiatrist Elisabeth Kübler-Ross called death the key to the door of life: “It is the denial of death that is partially responsible for people living empty, purposeless lives; for when you live as if you’ll live forever, it becomes too easy to postpone the things you know that you must do.”

On a cloudless November night in 1572, Tycho Brahe observed an unusually bright star in the northern sky that suddenly appeared in the constellation Cassiopeia. It had been assumed since antiquity that anything beyond the moon's orbit was eternally immutable. That star, SN 1572, is now classified as a supernova that is 7,500 light-years from Earth.

By 1592, Tycho Brahe had cataloged 777 stars. His mapping of those fixed stars blazed a trail for his protege, Johannes Kepler, to discover the laws that govern planetary motion. Several centuries later, it was a telescope named in Kepler's honor—the Kepler space telescope—that would catalog 530,506 stars.

Tycho Brahe is widely regarded as the greatest observer of the skies who had ever lived, but even Brahe couldn't have imagined the existence of half a million stars. And that's the tip of the iceberg. Astronomers now estimate the existence of more than two trillion gal¬axies. Each of those two trillion galaxies has an average of one hundred billion stars. Do the math, and that adds up to two hundred sextillion stars in the observable universe.

The point? Creation is much larger than any of us can imagine! And the same goes for the Creator. Like Tycho Brahe, some of us are quite content with our catalog of 777 stars. We think that's all there is. We've settled for a god we can measure and manage. If that's you, your god is too small.

Possible Preaching Angle: Why did God tell Abram to count the stars? (Gen. 15:5). God was messing with his mind, in a good way. He was giving Abram a nightlight—a visual reminder of both his history and his destiny. The same God who hung the stars in the sky can give you descendants. Faith adds God to every equation. When you do that, five loaves plus two fish equals all-you-can-eat for five thousand people. And there is more left over than you started with.

“For My thoughts are not your thoughts, neither are your ways My ways,” declares the LORD. “For as the heavens are higher than the earth, so My ways are higher than your ways and My thoughts than your thoughts.” Isaiah 55:8-9

To give these verses some perspective, the distance from one side of the universe to the other is an incredible 93 billion light-years. Using this as our measure, God likens the distance between our thoughts and his thoughts to the distance from one side of the universe to the other.

To put that immense number another way, 93 billion light-years is 544 septillion miles (544 followed by 20 zeros). Even if we tried to travel from one side of the universe to the other at the speed of light (5.88 trillion miles a year), it would take an infinite amount of time. That's because the universe will continue to expand whilst you are travelling, even at the speed of light. So, the edge of the universe will remain forever sealed off from you — even travelling at the speed of light.

That means that your best thought on your best day is ninety-three billion light-years short of how great God really is.

Possible Preaching Angles: Greatness of God; Omniscience of God; Trusting God – The immense wisdom, insight, and love of God should calm our fears. You may not understand your current crisis and worry about the outcome, but God is in control, His love for you is everlasting, His plan for you will happen, and you can rest secure that your Father is watching over you.

The Freakonomics podcast explored why the phrase “I don’t know” is so difficult for people to say. Contrary to the common belief that “I love you” is the hardest phrase, the hosts argue that “I don’t know” is even more challenging, and our reluctance to admit ignorance starts in childhood and persists into adulthood.

Psychological experiments show that when children are asked nonsensical questions, such as whether “a sweater is angrier than a tree,” most will invent answers rather than admit they don’t know. This tendency to fabricate answers instead of acknowledging uncertainty is not just a childhood trait-it carries over into adult life, especially in professional environments. In the business world, saying “I don’t know” is often seen as a sign of incompetence, so people feel pressured to respond with any answer, even if it’s made up.

The podcast hosts note that despite their reputation as “business experts,” they rarely hear anyone in corporate settings-especially in front of a boss-admit they don’t know something. The prevailing belief is that expertise means always having an answer, even if one must fake it. However, this mindset is counterproductive. Pretending to know everything may protect one’s image in the short term, but it stifles learning and personal growth.

The hosts argue that admitting “I don’t know” is essential for improvement and learning. Embracing uncertainty opens the door to genuine inquiry and self-betterment. Rather than faking expertise, the real path to growth is to acknowledge what we don’t know and use that as a starting point for discovery.

Benedict Cumberbatch has played a superhero involved in some precarious situations, but it turns out the actor has also experienced an actual life-threatening situation in his past. He revealed that in 2004, he was with friends in South Africa when they were robbed and abducted by six men. Eventually, Cumberbatch and his friends were tied up and made to sit execution-style before the men finally fled.

Cumberbatch said of the experience, “It gave me a sense of time, but not necessarily a good one. It made me impatient to live a life less ordinary, and I’m still dealing with that impatience.”

He also explained how the harrowing encounter spurred him to try extreme things to get his adrenaline up. “The near-death stuff turbo-fueled all that,” he said. “It made me go, ‘Oh, right, yeah, I could die at any moment.’ I was throwing myself out of planes, taking all sorts of risks.”

“But apart from my parents, I didn’t have any real dependents at that point. Now that’s changed, and that sobers you,” he added, in reference to his wife and three sons. “I’ve looked over the edge; it’s made me comfortable with what lies beneath it. And I’ve accepted that that’s the end of all our stories.”

In a remarkable story of perseverance and hope, a 47-year-old mother of five from Cookeville, Tennessee, has graduated from Tennessee Tech University after losing her sight in 2020. Despite the challenge of blindness, Amanda Juetten graduated magna cum laude, refusing to let her condition define her or limit her aspirations. “I want people to know that blindness doesn’t have to stop you from pursuing your dreams,” said Juetten.

Throughout her studies, she relied on assistive technology, the support of her family, and her own determination to overcome obstacles. “There were days when I felt overwhelmed, but I kept telling myself, ‘You can do this,’” she said. One professor remarked, “Her dedication to her education and her family is truly extraordinary.” Another classmate added, “She’s shown all of us what’s possible when you refuse to give up, no matter the circumstances.”

Now a proud graduate, Juetten plans to use her degree to advocate for the blind community and help others facing similar challenges. “I want to be a voice for those who feel unseen,” she explained. Her story is a testament to the power of determination and the importance of never losing sight of one’s dreams, even in the face of overwhelming odds.

Possible Preaching Angle:

Even when we refuse to let our limitations define us, we are called to trust that God’s purpose for our lives remains—He can use our greatest challenges as platforms for His glory.

Harvard geneticist David Sinclair’s business pitch has remained largely the same: Aging can be slowed or reversed, and we are about to figure out how.

“A lot of my colleagues dislike that phrase, the reversibility of aging,” he told a roomful of longevity investors. “But I truly believe that, based on my lab’s research and now others, that aging can be reversed. If I can make one medicine that would change people’s lives, I’d be very happy.” Sinclair also has co-founded companies that sell directly to consumers products such as supplements and tests that purport to show one’s “biological age.” He has also helped raise more than $1 billion.

But according to a report in The Wall Street Journal, the investors have almost nothing to show for it. Four companies trying to develop longevity drugs have gone bankrupt or largely halted operations. Another four either haven’t yet tested their drugs or gene therapies in humans or have run only small-scale trials that make it difficult to know whether a drug will work.

Sinclair has drawn criticism from fellow scientists, who say he exaggerates the findings and implications of age-related research. The board of the Academy for Health and Lifespan Research, a group Sinclair co-founded and led, asked him to resign as president earlier this year after he was quoted as saying a dog chew sold by a company he co-founded reversed aging in dogs.

Possible Preaching Angles:

It looks like we’re still living in the reality of the Fall, that human beings will age, grow old, and eventually die. We are still mortal!

A mallard duck was caught on a speed camera flying at 52 km/h (32 mph) in a 30 km/h zone, in the Swiss town of Köniz, near Bern. The event took place recently and has sparked a mix of amusement and fascination among locals and media alike.

What makes the story more intriguing is that a similar incident happened on the exact same date and location seven years prior, leading officials to jokingly suggest the duck might be a repeat offender. Officials from the local police department noted the odd coincidence: “The chance that the same bird would be flying at the exact same speed at the exact same spot seven years apart is remarkable.”

While no actual ticket was issued, the incident has sparked conversations about wildlife and human technology intersections. The story has since gained traction on social media, highlighting the lighter side of law enforcement and wildlife encounters. Residents of Köniz shared their amusement, with one saying, “It’s not every day you get to see a duck caught speeding!”

Possible Preaching Angle:

The story of the duck reminds us of the beauty and unpredictability of God’s creatures, and how even in a world full of human rules and technology, animals continue to live according to their own rhythms.

“Most of us will live an amazingly long life and should not worry so much about dying young.” Those are the words of Jonathan Clements, 61, who wrote more than 1,000 personal finance columns for The Wall Street Journal between 1994 and 2015. Plan on living past 90 and save accordingly, he advised, when he wasn’t running marathons or riding bicycles.

In May of 2024, he saw a doctor about some balance issues. Two days later, he received a devastating cancer diagnosis. Scans revealed a golf-ball-size tumor on his lung, and the disease has spread to his brain, his liver and elsewhere. Anything beyond 12 decent months would be a victory. “I’m definitely on the clock here,” he said as we sat at his kitchen table this week.

Clements said, “The No. 1 thing money can do for us is to give us a sense of financial security, and the way it does that is not to spend it and to hang onto it.”

Possible Preaching Angle:

Clements did not know that there is only one source of true security, and it is not money. “God is our refuge and strength, a very present help in trouble” (Psa. 46:1).

The longevity business is booming. People are flocking to longevity meetings and taking compounds they hope will extend their lives. Investors are backing scientists researching techniques to reprogram cells to a younger state. Longevity influencers argue that if they can live long enough, scientific breakthroughs will keep them going indefinitely. “We are going to start to understand how to rejuvenate and revitalize ourselves. This is what science does,” said Dr. Peter Diamandis, a 63-year-old entrepreneur who runs longevity trips for investors.

But S. Jay Olshansky, who studies the upper bounds of human longevity at the University of Illinois Chicago, believes people shouldn’t expect to live to 100. He contends most will reach between 65-90. Olshansky said, “It’s basic biology. As people grow older, their cells and tissues accumulate damage. Breakdowns of one kind or another happen more frequently and get increasingly difficult to repair.”

Nobel laureate Venki Ramakrishnan explained the many reasons in his book, Why We Die. He doesn’t believe current interventions will dramatically extend lifespan. Techniques to reverse aging would have to help every system in the body, including the brain, over a long period.

In 1979 Dr. Ellen Langer, a Psychology Professor at Harvard, designed a weeklong experiment for a group of 75-year-old men. The men knew very little about the nature of the experiment, except that they would be gone for a week. When the men arrived, they were told that for the coming week they were to pretend it was 1959 (not 1979) the time when these 75-year-old men were only 55-years-old. They were told to dress and act like they did at that time. They were given ID badges with pictures of themselves in their mid-50s.

Over the course of that week, they were instructed to talk about President Eisenhower (as though he were still President) and other events in their lives that had happened at that time. They were to talk about their old jobs like they were working in them now, and not as if they had retired from them. Copies of LIFE magazine and the Saturday Evening Post from 1959 were displayed on coffee tables. Everything was designed to make them see through the lens of their 55-year-old selves.

Before this retreat the men were tested on every aspect of life that we assume deteriorates with age. By the end of the retreat most of the men had improved in every one of these categories. For example, they were significantly more flexible, had better posture, and even much improved hand strength. Their average eyesight improved by almost 10%, as did their performance on tests of memory. In more than half the men intelligence increased as well. Their physical appearance changed. Random people who did not know anything about the experiment were shown pictures of the men before and after the experiment and asked to guess their age. Based on these objective ratings the men were described as looking on average three years younger than when they arrived.

Professor Langer demonstrated that even when objectively nothing has changed about us, simply having a different mindset can powerfully shape our reality.

Possible Preaching Angle:

In Ephesians 4:24-5:2, the Apostle Paul observed that when a person adopts a new mindset, not because they have been tricked into a different way of thinking because of their surroundings but, based on the reality of being made new creations, they can experience a profound transformation.

Trinity Evangelical Divinty School professor Kevin Vanhoozer writes about caring for his aging mother in an issue of CT magazine:

For nine years now, I have been watching my mother’s identity slowly fade as memories and capacities switch off, one after another, like lights of a house shutting down for the night. Marriage may be a school of sanctification, as Luther said, but caring for aging parents is its grad school, especially when he or she lives with you and suffers from dementia.

It’s been said that as we become older, we become caricatures of ourselves. Dementia speeds the process. It’s easy to see why: With loss of executive cognitive functioning, we’re less prone to monitor what we say and do. We begin to fly on auto-pilot, re-tracing again and again well-trod paths.

What lies under … the social masks we have carefully constructed? What lies under my mother’s happy face? (“I’m fine,” she’d say, even after a fall). I recently discovered the answer.

Years into the dementia, she lost her last line of defense and began to voice her inmost thoughts aloud. “Father, don’t let me fall” accompanied her every shuffling step behind her walker. Initially I thought this terribly sad—clearly, she wasn’t fine but anxious—yet I eventually found it comforting. The Bible depicts life as a walk: Shouldn’t we all be praying to the Lord to help us avoid missteps? Though she had forgotten former friends and neighbors, and large swaths of her own life, she remembered the fatherhood of God.

Humans have been trying to chase away gray hair for millennia. Clay tablets from the Assyrian Empire dated to the 7th Century B.C. mention using the gall of a black ox, cypress oil, licorice, and honey to turn gray hair black.

Ancient Egyptians applied oil cooked with the blood of a black calf, according to the 3,500-year-old Ebers Papyrus. (Presumably, if it worked, we’d still be trying it).

Tech entrepreneur Bryan Johnson, who is spending millions experimenting on himself to slow aging, posted a YouTube video detailing his regimen to reverse hair loss and graying; the video has over 1.5 million views.

Johnson, 46, uses two topical treatments. One contains an herbal extract that, Johnson acknowledges, has colored his hair. But he says something is reversing his grays. When he has looked closely at plucked hairs, he says color has returned to some of them.

What is working? He isn’t sure. Johnson’s routine also includes more than 50 supplements daily and trips to a Honduran island for $25,000 gene-therapy injections.

The Paralympic Games is a celebration of athletic achievement for those with physical disabilities. It has been marred by a growing concern: “classification doping,” (which borrows language used to describe performance enhancing substance abuse). Athletes are misrepresenting the extent of their disabilities to gain an unfair advantage over competitors.

Double amputee Oksana Masters, a prominent Paralympic athlete, believes officials are more interested in maintaining a positive image than addressing the issue. "They want to keep the warm and fuzzy narrative going," she said. "If they knew what's really going on behind closed doors, they'd be shocked."

The Paralympic classification system is designed to place athletes into competitions with others who have similar impairments. While some disabilities are easy to categorize, others are more ambiguous, relying on the judgment of medical classifiers and the integrity of the athletes themselves.

The most infamous Paralympic cheating scandal came at the 2000 Sydney Games, where Spain’s intellectual disability men’s basketball team won the gold medal despite fielding a roster with 10 players who did not have disabilities.

Physician Kevin Kopera, a volunteer in the Paralympic classification system, is cautious about dismissing the issue. "I don't believe anyone can say to what degree misrepresentation exists in parasports," he said. "Any statement in this regard would be speculative. Certainly, to say it doesn't exist would not be realistic. The stakes are too high."

One-third of U.S. adults said they would probably or definitely take a drug to prevent or reverse graying if such a medication were approved, according to a poll of 9,000 people. Some endorse gobbling black sesame seeds and blackstrap molasses to give gray hair the brush off. Others take liquid chlorophyll or douse their hair in onion juice. In online forums, posts about reversing grays can draw hundreds of replies.

Humans have been trying to chase away gray for millennia. Clay tablets from the Assyrian Empire dated to the 7th Century B.C. mention using the gall of a black ox, cypress oil, licorice, and honey to turn gray hair black. Ancient Egyptians applied oil cooked with the blood of a black calf, according to the 3,500-year-old Ebers Papyrus. (Presumably, if it worked, we’d still be trying it).

Tech entrepreneur Bryan Johnson, who is spending millions experimenting on himself to slow aging, posted a YouTube video detailing his regimen to reverse hair loss and graying; the video has nearly 700,000 views.

Johnson, 46, uses two topical treatments. One contains an herbal extract that, Johnson acknowledges, has colored his hair. But he says something is reversing his grays. When he has looked closely at plucked hairs, he says color has returned to some of them. What is working? He isn’t sure. Johnson’s routine also includes more than 50 supplements daily and trips to a Honduran island for $25,000 gene-therapy injections.

On a recent episode of The Howard Stern Show, the “shock-jock” host asked his guest, music legend Paul Simon, questions about music, life, art, and anything else that came to mind. Stern rose to fame with his exaltation of immorality and self-adulation. At the end of the interview, Stern said:

Paul, just give me one last answer. You seem very wise. You’ve lived through everything. You’ve created great masterpieces. Is there a God? Because I need to know. I’m getting older. Is this it for me? Am I going to die and that’s it or am I going somewhere? And please answer it in a serious manner.

Simon responded,

This is my feeling about God or Creator. The planet that I’m living on is so beautiful and the universe is so awe-inspiring. If that is the work of a creator, I say, “Thanks so much. I really love your work on the universe. Excellent work, coming from me, Paul Simon, to you, I really dig what you’re doing.” If it turns out that there’s another explanation for creation, I’m still unbelievably grateful for my existence. I still think it’s amazing. If it turns out, I thought it was God but it’s some other explanation, it doesn’t matter to me ….

Then, Stern interrupted, “But it’s so cruel. We have this existence and then we have to disappear. It’s hard.”

Actress and former Seinfeld star (as Elaine) Julia Louis-Dreyfus has had moments when tragedy and comedy get put in a blender. Monday, September 18, 2017, was one of them. Louis-Dreyfus and the hit TV show Veep had triumphed at the Emmys the night before. By morning, her doctor was on the phone telling her she had cancer. The first thing she did after hanging up was double over with laughter.

She said, “I mean, it felt like it was written. It felt like it was a horrible black comedy. And then it sort of morphed into crying hysterically.” [But she was also] terrified. “You just simply don’t consider it for yourself, you know, that’s sort of the arrogance of human beings. But of course, at some point, we’re all going to bite it.”

Pastor John Yates III once worked for the British scholar and Bible teacher John Stott. Yates reflected on the time when Stott’s aging and disability started to slow Stott down. Yates says:

Stott spent the last 15 years of his life going completely blind. It began with a small stroke that knocked out the peripheral vision in his left eye, forcing him to surrender his driver’s license. And over the years that followed, this man who wrote more books during his lifetime than most of us will read in an average decade became unable to see the pages in front of him. But that wasn't all. His body grew increasingly weak. He needed more sleep. He was eventually confined to his bedroom.

I spent three years working closely with John when he was in his early 70s. I was in my mid-20s. It was absolutely exhausting. I've never been around another person with a capacity for work as fast as his. He was the most disciplined and efficient man I've ever known. But there he was, years later, now in his 80s and into his early 90s, with his mind as sharp as ever. But then he was unable to do much of anything, except to sleep, eat, and listen out his bedroom window for the call of a familiar bird.

Now I found this personally incredibly difficult to understand. Why would God allow a man like John to suffer the loss of precisely those faculties that made his life so meaningful and has worked so successful, if it just seemed cruel? It would have been better, I thought, for him to die or to suffer from Alzheimer's, because at least then he wouldn't have known what he was missing.

But then I finally begin to understand why John never seemed to complain. That's because God was giving him the gift of absolute dependence. God was showing him that he delighted to offer Stott a dependence on him.

Our existence on a Goldilocks planet in a Goldilocks universe is so statistically improbable that many scientists believe in the multiverse. In other words, so many universes exist that it’s not surprising to find one planet in one of them that’s just right for human life.

Other scientists don’t want to make such a leap of faith. They see this world as the result of intelligent design. That, however, suggests God. So, atheists seeking an alternative are following Oxford philosopher Nick Bostrom, who suggested that we “are almost certainly living in a computer simulation.” Neil deGrasse Tyson gave the theory credibility by saying it was a 50-50 possibility, and Richard Dawkins has taken it seriously. Elon Musk semi-popularized it in 2016 by saying he thought it true.

That raises the question: Who or what is the simulator? Some say our distant descendants with incredibly high-powered computers. One of the theory’s basic weaknesses is that, as Bostrom acknowledges, it assumes the concept that silicon-based processors in a computer will become conscious and comparable to the neural networks of human brains. Simulation theory has many other weaknesses, and those who understand the problems of both the simulation and multiverse hypotheses should head to the logical alternative: God.

We may not want to admit it but author Arthur Brooks is convincing when he writes to the effect that age-related decline will come much sooner than we think. We might make excuses for ourselves but our recall of names and places is not what it used to be. He writes:

By the time you are fifty your brain is as crowded with information as the New York Public Library. Meanwhile, your personal research librarian is creaky, slow, and easily distracted. When you send him to get some information you need—say, someone’s name—he takes a minute to stand up, stops for coffee, talks to an old friend in the periodicals, and then forgets where he was going in the first place. Meanwhile, you are kicking yourself for forgetting something you have known for years. When the librarian finally shows back up and says, “That guy’s name is Mike,” Mike is long gone and you are doing something else.