In science, as in art, and, as I believe, in every other sphere of human activity, there may be wisdom in a multitude of counsellors, but it is only in one or two of them.

Science is simply common sense at its best, that is, rigidly accurate in observation, and merciless to fallacy in logic.

The best men of the best epochs are simply those who make the fewest blunders and commit the fewest sins.

My business is to teach my aspirations to confirm themselves to fact, not to try and make facts harmonize with my aspirations.

It is because the body is a machine that education is possible. Education is the formation of habits, a superinducing of an artificial organization upon the natural organization of the body.