“Almost every wise saying has an opposite one, no less wise, to balance it.”

“A habitual indulgence in the inarticulate is a sure sign of the philosopher who has not learned to think, the poet who has not learned to write, the painter who has not learned to paint, and the impression that has not learned to express itself--all of which are compatible with an immensity of genius in the inexpressible soul.”

“The wisest mind has something yet to learn.”

“The wisest man has something yet to learn.”

“The contemporary world has turned its back on the attempt and even on the desire to live reasonably.”

“One's friends are that part of the human race with which one can be human.”

“Since the days of Descartes it has been a conception familiar to philosophers that every visible event in nature might be explained by previous visible events, and that all the motions, for instance, of the tongue in speech, or of the hand in painting, might have merely physical causes. If consciousness is thus accessory to life and not essential to it, the race of man might have existed upon the earth and acquired all the arts necessary for its subsistence without possessing a single sensation, idea, or emotion. Natural selection might have secured the survival of those automata which made useful reactions upon their environment. An instinct would have been developed, dangers would have been shunned without being feared, and injuries avenged without being felt.”