While swimming, I like to do backstroke and look up at the sky through the glass roof of the pool. From my apartment, I see a large expanse of sky, a rare and fortunate view for a New York apartment-dweller. Looking at the sky calms me. I will never forget the first time I drove across the country. Once I hit Kansas, and the ground spread in all directions, totally flat, the sky looked enormous, bigger than I had ever seen it. There was little to break up its vastness. And I could see the highway laid out before me, straight into some infinite space.