 So I was standing on the street, staring at my broken bike, wondering what to do, fearful of my father's reaction, expecting justified and condign punishment for breaking his rule. And as I was befuddled there, a young black kid I'd never met came up and generously offered to help. He and I, my newfound friend, dragged the bike to my father's doorstep. And when my father opened the door, I introduced my new friend, and he...