On the northwestern shore of Africa, about 150 miles south of the Canary Islands, there's a bulge called Cape Bojador. For early 15th-century Europeans, this was the cosmic "You Are Here" sticker - north of it was civilization and cities of light; south was the Sea of Darkness, complete with boiling seas, giant creatures, and perpetual bad vibes. No sailor had gone south and returned, because apparently the unknown was terrifying and also full of monsters.
Enter Prince Henry of Portugal, who between 1424 and 1434 sent 14 expeditions to round the cape. All 14 failed, because fear and foul weather are a tough combo. But on the 15th try, explorer Gil Eannes gave the cape a wide berth, sailed far west, and - surprise - lived to tell the tale. He even landed in a bay miles south and saw footprints of humans and camels, proving that the Sea of Darkness was really just another Tuesday.
Prince Henry's triumph kickstarted the Age of Discovery, improved mapmaking, and opened new trade routes. But more importantly, it expanded our perspective - of geography, of possibilities, and of our place in the world. And as any toddler will tell you (around age 2, when they start saying "me" and "mine"), perspective begins early. From parents to nursery to neighborhood, we gradually figure out what the world contains. Yet more than 20 percent of Americans have never traveled abroad, and over half live in the state where they were born. So much for global perspective.
Over the last century, astronomy and biology have blown our minds even further. We've learned our solar system sits on the outskirts of the Milky Way - a galaxy of 100 billion stars that takes light (186,000 miles per second) 100,000 years to cross. And there are other galaxies. Many. The mind reels, much like an ant in New York City contemplating a trip to San Francisco. Our houses, bridges, and cities are a speck on a dust mote on a grain of sand on a vast beach. You get the idea.
Time-wise, the universe started about 14 billion years ago - roughly 100 million human lifetimes. Our individual lives are fleeting moments in this grand unfolding. Everything passes: Sumeria, Egypt, ancient Greece and Rome, Tenochtitlán, Port Royal, the English village of Dunwich. All gone. What we see today will also be gone, because the universe has no sentimental attachment to your favorite coffee shop.
But here's the real kicker: how improbable you are. Advances in biology show that the instructions for creating each human are encoded in DNA. There are more possible arrangements of human DNA than atoms in the observable universe. Each female has about 300,000 eggs; each male ejaculation has about 300 million sperm. So each conception involves about 100 trillion possible combinations. Only one led to you. To visualize: take a ruler stretching from here to Pluto. One inch of that distance is you. The rest is all the other humans that could have been but never were. Congratulations - you've won a lottery with 100 trillion players.
Being alive is the most extraordinary stroke of luck we'll ever experience, and also the easiest to overlook. We wake up, have coffee, send kids to school, worry about deadlines, and forget that beneath it all lies existence itself - so unlikely it borders on miraculous. We postpone joy, assuming there will always be more time. We don't notice the beauty in small moments. The author notes this, while acknowledging that in our frantic world, many don't have the luxury to pause.
And here's the twist: there will never be another you in the future of the universe. (Apologies to Buddhists and Hindus who believe in rebirth, but even the reborn isn't the same.) From billions of years ago to billions ahead, the universe will never see another you. We couldn't have grasped this perspective a century ago, but now we have it - not through ships, but through laboratories, telescopes, and our minds.
So what to do with this fantastically improbable existence? The author suggests gratitude over entitlement - not just for the long chain of accidents, but for the people who helped along the way. He describes a Buddhist meditation retreat where he learned about the "retinue": a constellation of mentors. He collected photos of parents, teachers, rabbis, and colleagues, made a poster, and hung it above his desk. Each day, he looks up and gives thanks. Simple, but it helps him slow down and acknowledge his good fortune.
Marcus Aurelius, the Roman emperor and philosopher, wrote in his Meditations: "Whatever you do, whatever you project, so do and so project as one who may at this very moment depart out of this life." With our one brief moment, we can try to make the world slightly better. Gratitude without action is empty. The mentors gave something; the author can't repay them individually, but can pass on kindness and good faith to the world.
There's an irony: as each of us dwindles compared to cosmic space and time, our improbable existence becomes more important. With great fortune comes responsibility - not to the universe (which is mindless) or to potential humans who never existed, but to ourselves. To not waste this precious life. In the immense hallways of time and space, out of infinite accidents, we are here. We breathe. We see. We feel. That's not a thing to be wasted or left unobserved.
Early in the 20th century, Alsatian philosopher Albert Schweitzer introduced a concept he called Ehrfurcht vor dem Leben - "Reverence for Life." In 1915, while traveling on a river in Africa, he saw the sun shimmering on water, tropical forest, and a herd of hippopotamuses. Suddenly, he felt it. As he put it: "I am life that wills to live in the midst of other life that wills to live." So, as poet Mary Oliver asks: "Tell me, what is it you plan to do with your one wild and precious life?"