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

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.

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.

The more you put in your brain, the more it will hold - if you have one.

The trouble with an alarm clock is that what seems sensible when you set it seems absurd when it goes off

Measure your minds height by the shadow it casts.

We are all vainer of our luck than of our merits.