Part IIn Perfect Health I BeginThe hand of the Lord was upon me, and carried me out in the spirit of the Lord, and set me down in the midst of the valley which was full of bones,And caused me to pass by them round about: and, behold, there were very many in the open valley; and, lo, they were very dry.And he said unto me, Son of man, can these bones live?—Ezekiel 37:1–3, King James translationI knew with certainty that I would never be a doctor. I stretched out in the sun, relaxing on a desert plateau just above our house. My uncle, a doctor, like so many of my relatives, had asked me earlier that day what I planned on doing for a career, now that I was heading off to college, and the question barely registered. If you had forced me to answer, I suppose I would have said a writer, but frankly, thoughts of any career at this point seemed absurd. I was leaving this small Arizona town in a few weeks, and I felt less like someone preparing to climb a career ladder than a buzzing electron about to achieve escape velocity, flinging out into a strange and sparkling universe.I lay there in the dirt, awash in sunlight and memory, feeling the shrinking size of this town of fifteen thousand, six hundred miles from my new college dormitory at Stanford and all its promise.I knew medicine only by its absence—specifically, the absence of a father growing up, one who went to work before dawn and returned in the dark to a plate of reheated dinner. When I was ten, my father had moved us—three boys, ages fourteen, ten, and eight—from Bronxville, New York, a compact, affluent suburb just north of Manhattan, to Kingman, Arizona, in a desert valley ringed by two mountain ranges, known primarily to the outside world as a place to get gas en route to somewhere else. He was drawn by the sun, by the cost of living—how else would he pay for his sons to attend the colleges he aspired to?—and by the opportunity to establish a regional cardiology practice of his own. His unyielding dedication to his patients soon made him a respected member of the community. When we did see him, late at night or on weekends, he was an amalgam of sweet affections and austere diktats, hugs and kisses mixed with stony pronouncements: “It’s very easy to be number one: find the guy who is number one, and score one point higher than he does.” He had reached some compromise in his mind that fatherhood could be distilled; short, concentrated (but sincere) bursts of high intensity could equal . . . whatever it was that other fathers did. All I knew was, if that was the price of medicine, it was simply too high.From my desert plateau, I could see our house, just beyond the city limits, at the base of the Cerbat Mountains, amid red-rock desert speckled with mesquite, tumbleweeds, and paddle-shaped cacti. Out here, dust devils swirled up from nothing, blurring your vision, then disappeared. Spaces stretched on, then fell away into the distance. Our two dogs, Max and Nip, never grew tired of the freedom. Every day, they’d venture forth and bring home some new desert treasure: the leg of a deer, unfinished bits of jackrabbit to eat later, the sun-bleached skull of a horse, the jawbone of a coyote.My friends and I loved the freedom, too, and we spent our afternoons exploring, walking, scavenging for bones and rare desert creeks. Having spent my previous years in a lightly forested suburb in the Northeast, with a tree-lined main street and a candy store, I found the wild, windy desert alien and alluring. On my first trek alone, as a ten-year-old, I discovered an old irrigation grate. I pried it open with my fingers, lifted it up, and there, a few inches from my face, were three white silken webs, and in each, marching along on spindled legs, was a glistening black bulbous body, bearing in its shine the dreaded blood-red hourglass. Near to each spider a pale, pulsating sac breathed with the imminent birth of countless more black widows. Horror let the grate crash shut.