To be radical, an empiricism must neither admit into its constructions any element that is not directly experienced, nor exclude from them any element that is directly experienced.

A winner's attitude: it may be difficult, but it's possible. A loser's attitude: It may be possible, but it's too difficult.

Objective evidence and certitude are doubtless very fine ideals to play with, but where on this moonlit and dream-visited planet are they found?

We forget that every good that is worth possessing must be paid for in strokes of daily effort.

The community stagnates without the impulse of the individual. The impulse dies away without the sympathy of the community.

Anything you may hold firmly in your imagination can be yours.

The great thing, then, in all education, is to make our nervous system our ally instead of our enemy.