You see, painting has now become, or all art has now become completely a game, by which man distracts himself. What is fascinating actually is, that it's going to become much more difficult for the artist, because he must really deepen the game to become any good at all.

If a man's wit be wandering, let him study the mathematics; for in demonstrations, if his wit be called away never so little, he must begin again.

Boldness is a child of ignorance

Travel, in the younger sort, is a part of education; in the elder, a part of experience. He that travelleth into a country before he hath some entrance into the language, goeth to school, and not to travel.

The only hope [of science] ... is in genuine induction.

The greatest trust between man and man is the trust of giving counsel.

Nothing is pleasant that is not spiced with variety.