Life, when is spent well, is long.

Experience never misleads; what you are misled by is only your judgment, and this misleads you by anticipating results from experience of a kind that is not produced by your experiments.

To be a winner you must want to win but must know of the chance of losing and must not fear of it.

Those who condemn the supreme certainty of mathematics feed on confusion, and can never silence the contradictions of the sophistical sciences which lead to eternal quackery.

Those who are inspired by a model other than Nature, labor in vain.

Truly man is the king of beasts, for his brutality exceeds them. We live by the death of others. We are burial places.

How painting surpasses all human works by reason of the subtle possibilities which it contains.