The philosophies of one age have become the absurdities of the next, and the foolishness of yesterday has become the wisdom of tomorrow.

What is the student but a lover courting a fickle mistress who ever eludes his grasp?

Soap and water and common sense are the best disinfectants.

It is much more important to know what sort of a patient has a disease than what sort of a disease a patient has.

The teacher's life should have three periods, study until twenty-five, investigation until forty, profession until sixty, at which age I would have him retired on a double allowance.

The philosophies of one age have become the absurdities of the next, and the foolishness of yesterday has become the wisdom of tomorrow.

The great majority gave no signs one way or the other; like birth, their death was a sleep and a forgetting.