Look at your feet. You are standing in the sky. When we think of the sky, we tend to look up, but the sky actually begins at the earth.

Living with anyone for many years takes skill. To keep peace in the household, couples learn to adapt to one another, hopefully in positive ways.

If we mammals don't get something to eat every day or two, our temperature drops, all our signs fall off, and we begin to starve. Living at biological red alert, it's not surprising how obsessed we are with food; I'm just amazed we don't pace and fret about it all the time.

We ogle plants and animals up close on television, the Internet and in the movies. We may not worship the animals we see, but we still regard them as necessary physical and spiritual companions. Technological nature can't completely satisfy that yearning.

If cynicism is inevitable as one ages, so is the yearning for innocence. To children heaven is being an adult, and to adults heaven is being children again.

An animal on a leash is not tamed by the owner. The owner is extending himself through the leash to that part of his personality which is pure dog, that part of him which just wants to eat, sleep, bark, hump chairs, wet the floor in joy, and drink out of a toilet bowl.

Flying has changed how we imagine our planet, which we have seen whole from space, so that even the farthest nations are ecological neighbors. It has changed our ideas about time. When you can gird the earth at 1,000 m.p.h., how can you endure the tardiness of a plumber? Most of all, flying has changed our sense of our body, the personal space in which we live, now elastic and swift. I could be in Bombay for afternoon tea if I wished. My body isn't limited by its own weaknesses; it can rush through space.