Man's brain, enlarged fortuitously, invented words in an ambitious attempt to learn how to think, only to have them usurped by his emotions. But we still try.

I cannot agree that mountain climbing is merely one manifestation of man's spiritual aspirations. I think instead it is a hysterical paroxysm of his infantile vanity.

A man may debar nonsense from his library of reason, but not from the arena of his impulses.

I understand the technique of eccentricity; it would be futile for a man to labor at establishing a reputation for oddity if he were ready at the slightest provocation to revert to normal action.

To say that a man is a reasoning animal is a very different thing than to say that most of man's decisions are based on his rational process. That I don't believe at all.