An idea, to be suggestive, must come to the individual with the force of revelation.

Science, like life, feeds on its own decay. New facts burst old rules; then newly divined conceptions bind old and new together into a reconciling law.

Human beings can alter their lives by altering their attitudes of mind.

Both thought and feeling are determinants of conduct, and the same conduct may be determined either by feeling or by thought.

'Facts' are the bounds of human knowledge, set for it, not by it.

What a teacher needs to know about psychology "might almost be written on the palm of one's hand."

A chain is no stronger than its weakest link, and life is after all a chain.