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

No bubble is so iridescent or floats longer than that blown by the successful teacher.

Gentlemen, I have a confession to make. Half of what we have taught you is in error, and furthermore we cannot tell you which half it is

He who knows syphilis knows medicine

If it were not for the great variability among individuals, medicine might as well be a science, not an art.

A library represents the mind of its collector, fancies and foibles, strengths and weaknesses, prejudices and preferences.

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