I remember his words on full-moon nights in Addis Ababa when knives are flashing and rocks and bullets are flying, and when I feel as if I am standing in an abattoir and not in Operating Theater 3, my skin flecked with the grist and blood of strangers. I remember. But you don't always know the answers before you operate. One operates in the now. Later, the retrospectoscope, that handy tool of the wags and pundits, the conveners of the farce we call M&M—morbidity and mortality conference—will pronounce your decision right or wrong. Life, too, is like that. You live it forward, but understand it backward. It is only when you stop and look to the rear that you see the corpse caught under your wheel.

Now, in my fiftieth year, I venerate the sight of the abdomen or chest laid open. I'm ashamed of our human capacity to hurt and maim one another, to desecrate the body. Yet it allows me to see the cabalistic harmony of heart peeking out behind lung, of liver and spleen consulting each other under the dome of the diaphragm—these things leave me speechless. My fingers “run the bowel” looking for holes that a blade or bullet might have created, coil after glistening coil, twenty-three feet of it compacted into such a small space. The gut that has slithered past my fingers like this in the African night would by now reach the Cape of Good Hope, and I have yet to see the serpent's head. But I do see the ordinary miracles under skin and rib and muscle, visions concealed from their owner. Is there a greater privilege on earth?

At such moments I remember to thank my twin brother, Shiva— Dr. Shiva Praise Stone—to seek him out, to find his reflection in the glass panel that separates the two operating theaters, and to nod my thanks because he allows me to be what I am today. A surgeon.