The ancient intuition that all matter, all "reality," is energy, that all phenomena, including time and space, are mere crystallizations of mind, is an idea with which few physicists have quarreled since the theory of relativity first called into question the separate identities of energy and matter. Today most scientists would agree with the ancient Hindus that nothing exists or is destroyed, things merely change shape or form; that matter is insubstantial in origin, a temporary aggregate of he pervasive energy that animates the electron.

If we were doomed to live forever, we would scarcely be aware of the beauty around us.

You see ... a man like me, a cautious man, has his life all figured out according to a pattern, and then the pattern flies apart. You run around for quite a while trying to repair it, until one day you straighten up again with an armful of broken pieces, and you see that the world has gone on without you and you can never catch up with your old life, and you must begin all over again.

Zen is really just a reminder to stay alive and to be awake. We tend to daydream all the time, speculating about the future and dwelling on the past. Zen practice is about appreciating your life in this moment. If you are truly aware of five minutes a day, then you are doing pretty well. We are beset by both the future and the past, and there is no reality apart from the here and now.

How could I say that I wished to penetrate the secrets of the mountains in search of something still unknown that, like the yeti, might well be missed for the very fact of searching?

When I'm in the field, when I'm working, I keep very careful notes. I wear big shirts with big breast pockets, and I carry in them two little spiral notebooks.

The concept of conservation is a far truer sign of civilization than that spoilation of a continent which we once confused with progress.