To instruct calls for energy, and to remain almost silent, but watchful and helpful, while students instruct themselves, calls for even greater energy. To see someone fall (which will teach him not to fall again) when a word from you would keep him on his feet but ignorant of an important danger, is one of the tasks of the teacher that calls for special energy, because holding in is more demanding than crying out.

Never harbor grudges; they sour your stomach and do no harm to anyone else.

Moderation, the Golden Mean, the Aristonmetron, is the secret of wisdom and of happiness. But it does not mean embracing an unadventurous mediocrity; rather it is an elaborate balancing act, a feat of intellectual skill demanding constant vigilance. Its aim is a reconciliation of opposites.

I came at last to a recognition of myself as, in part, a Tom Sawyer who wanted everything done according to the rules of romantic fiction, and complicated simple solutions with his absurd adolescent, book-born nonsense.

Oh hearts! Nobody gets through life without a broken heart. The important thing is to break the heart so that when it mends it will be stronger than before.

The love of truth lies at the root of much humor.

Art is wine and experience is the brandy we distill from it.