Logic is the art of going wrong with confidence.

Technology made large populations possible; large populations now make technology indispensable.

In our hearts those of us who know anything worth knowing know that in March a new year begins, and if we plan any new leaves, it will be when the rest of Nature is planning them too.

Long before I ever saw the desert I was aware of the mystical overtones which the observation of nature made audible to me. But I have never been more frequently or more vividly aware of them than in connection with the desert phenomena.

The human mind can appreciate the One only by seeing it first in the Many.

A book ... unlike a television program, moving picture or any other 'modern means of communication' ... can wait for years, yet be available at any moment when it happens to be needed.

When a man wantonly destroys one of the works of man we call him a vandal. When he destroys one of the works of god we call him a sportsman.