It is only in marriage with the world that our ideals can bear fruit; divorced from it, they remain barren.

To avoid the various foolish opinions to which mankind are prone, no superhuman genius is required. A few simple rules will keep you, not from all error, but from silly error.

Awareness of universals is called conceiving, and a universal of which we are aware is called a concept.

Berkeley retains the merit of having shown that the existence of matter is capable of being denied without absurdity.

It is a curious and painful fact that almost all the completely futile treatments that have been believed in during the long history of medical folly have been such as caused acute suffering to the patient. When anesthetics were discovered, pious people considered them an attempt to evade the will of God. It was pointed out, however, that when God extracted Adam's rib He put him into a deep sleep. This proved that anesthetics are all right for men; women, however, ought to suffer, because of the curse of Eve.

Freedom in education has many aspects. There is first of all freedom to learn or not to learn. Then there is freedom as to what to learn. And in later education there is freedom of opinion.

A proverb is one man's wit and all men's wisdom.