The one great gift to humankind from our nuclear physicists has been the nuclear bomb. How can we ever thank them?

I now find the most marvelous things in the everyday, the ordinary, the common, the simple and tangible.

Within minutes my 115-mile walk through the desert hills becomes a thing apart, a disjunct reality on the far side of a bottomless abyss, immediately beyond physical recollection.But it's all still there in my heart and soul. The walk, the hills, the sky, the solitary pain and pleasure-they will grow larger, sweeter, lovelier in the days to come, like a treasure found and then, voluntarily, surrendered. Returned to the mountains with my blessing. It leaves a golden glowing on the mind.

How long does it take to write a good book? All of the years that you've lived.

There's nothing so obscene and depressing as an American Christmas.

The love of wilderness is more than a hunger for what is always beyong reach; it is also an expression of loyalty to the earth, the earth which bore us and sustains us, the only paradise we shall ever know, the only paradise we ever need, if only we had the eyes to see.

We live in a time of twin credulities: the hunger for the miraculous combined with a servile awe of science. The mating of the two gives us superstition plus scientism -- a Mongoloid metaphysic.