Judging from the scientists I know, including Eva and Ruth, and those whom I’ve read about, you can’t pursue the laws of nature very long without bumping into beauty. “I don’t know if it’s the same beauty you see in the sunset,” a friend tells me, “but it feels the same.” This friend is a physicist, who has spent a long career deciphering what must be happening in the interior of stars. He recalls for me this thrill on grasping for the first time Dirac’s equations describing quantum mechanics, or those of Einstein describing relativity. “They’re so beautiful,” he says, “you can see immediately they have to be true. Or at least on the way toward truth.” I ask him what makes a theory beautiful, and he replies, “Simplicity, symmetry, elegance, and power.”

　Why nature should conform to theories we find beautiful is far from obvious. The most incomprehensible thing about the universe, as Einstein said, is that it’s comprehensible. How unlikely, that a short-lived biped on a two-bit planet should be able to gauge the speed of light, lay bare the structure of an atom, or calculate the gravitational tug of a black hole. We’re a long way from understanding everything, but we do understand a great deal about how nature behaves. Generation after generation, we puzzle out formulas, test them, and find, to an astonishing degree, that nature agrees. An architect draws designs on flimsy paper, and her buildings stand up through earthquakes. We launch a satellite into orbit and use it to bounce messages from continent to continent. The machine on which I write these words embodies hundreds of insights into the workings of the material world, insights that are confirmed by every burst of letters on the screen, and I stare at that screen through lenses that obey the laws of optics first worked out in detail by Isaac Newton.

　By discerning patterns in the universe, Newton believed, he was tracing the hand of God. Scientists in our day have largely abandoned the notion of a Creator as an unnecessary hypothesis, or at least an untestable one. While they share Newton’s faith that the universe is ruled everywhere by a coherent set of rules, they cannot say, as scientists, how these particular rules came to govern things. You can do science without believing in a divine Legislator, but not without believing in laws.

　I spent my teenage years scrambling up the mountain of mathematics. Midway up the slope, however, I staggered to a halt, gasping in the rarefied air, well before I reached the heights where the equations of Einstein and Dirac would have made sense. Nowadays I add, subtract, multiply, and do long division when no calculator is handy, and I can do algebra and geometry and even trigonometry in a pinch, but that is about all that I’ve kept from the language of numbers. Still, I remember glimpsing patterns in mathematics that seemed as bold and beautiful as a skyful of stars.

　I’m never more aware of the limitations of language than when I try to describe beauty. Language can create its own loveliness, of course, but it cannot deliver to us the radiance we apprehend in the world, any more than a photograph can capture the stunning swiftness of a hawk or the withering power of a supernova. Eva’s wedding album holds only a faint glimmer of the wedding itself. All that pictures or words can do is gesture beyond themselves toward the fleeting glory that stirs our hearts. So I keep gesturing.

　”All nature is meant to make us think of paradise,” Thomas Merton observed. Because the Creation puts on a nonstop show, beauty is free and inexhaustible, but we need training　in order to perceive more than the most obvious kinds. Even 15 billion years or so after the Big Bang, echoes of that event still linger in the form of background radiation, only a few degrees above absolute zero. Lust so, I believe, the experience of beauty is an echo of the order and power that permeate the universe. To measure background radiation, we need subtle instruments; to measure beauty, we need alert intelligence and our five keen senses.

　Anyone with eyes can take delight in a face or a flower. You need training, however, to perceive the beauty in mathematics or physics or chess, in the architecture of a tree, the design of a bird’s wing, or the shiver of breath through a flute. For most of human history, the training has come from elders who taught the young how to pay attention. By paying attention, we learn to savor all sorts of patterns, from quantum mechanics to patchwork quilts. This predilection brings with it a clear evolutionary advantage, for the ability to recognize patterns helped our ancestors to select mates, find food, avoid predators. But the same advantage would apply to all species, and yet we alone compose symphonies and crossword puzzles, carve stone into statues, map time and space.

　Have we merely carried our animal need for shrewd perceptions to an absurd extreme? Or have we stumbled onto a deep congruence between the structure of our minds and the structure of the universe?

　I am persuaded the latter is true. I am convinced there’s more to beauty than biology, more than cultural convention. It flows around and through us in such abundance, and in such myriad forms, as to exceed by a wide margin any mere evolutionary need. Which is not to say that beauty has nothing to do with survival: I think it has everything to do with survival. Beauty feeds us from the same source that created us. It reminds us of the shaping power that reaches through the flower stem and through our own hands. It restores our faith in the generosity of nature. By giving us a taste of the kinship between our own small minds and the great Mind of the Cosmos, beauty reassures us that we are exactly and wonderfully made for life on this glorious planet, in this magnificent universe. I find in that affinity a profound source of meaning and hope. A universe so prodigal of beauty may actually need us to notice and respond, may need our sharp eyes and brimming hearts and teeming minds, in order to close the circuit of Creation.