If I go to the National Gallery and I look at one of the great paintings that excite me there, it's not so much the painting that excites me as that the painting unlocks all kinds of valves of sensation within me which return me to life more violently.

They are the best physicians, who being great in learning most incline to the traditions of experience, or being distinguished in practice do not reflect the methods and generalities of art.

What is truth? said jesting Pilate; and would not stay for an answer.

Defer not charities till death; for certainly, if a man weigh it rightly, he that doth so is rather liberal of another man's than of his own.

Next to religion, let your care be to promote justice.

Prosperity is the blessing of the Old Testament; adversity is the blessing of the New.

If any human being earnestly desire to push on to new discoveries instead of just retaining and using the old; to win victories over Nature as a worker rather than over hostile critics as a disputant; to attain, in fact, clear and demonstrative knowlegde instead of attractive and probable theory; we invite him as a true son of Science to join our ranks.