The journey is difficult, immense. We will travel as far as we can, but we cannot in one lifetime see all that we would like to see or to learn all that we hunger to know.

In the desert, an old monk had once advised a traveler, the voices of God and the Devil are scarcely distinguishable.

I am older now, and sleep less, and have seen most of what there is to see and am not very much impressed any more, I suppose, by anything.

The creature called man has a strange history. He is not of one piece, nor was he born of a single moment in time. His elementary substance is stardust almost as old as the universe.

One does not meet oneself until one catches the reflection from an eye other than human.

Choices, more choices than we like afterward to believe, are made far backward in the innocence of childhood.

It has been said repeatedly that one can never, try as he will, get around to the front of the universe. Man is destined to see only its far side, to realize nature only in retreat.