True courage is not the brutal force of vulgar heroes, but the firm resolve of virtue and reason.

Not ignorance, but ignorance of ignorance, is the death of knowledge.

An enormous part of our mature experience cannot not be expressed in words.

Art is the imposing of a pattern on experience, and our aesthetic enjoyment is recognition of the pattern.

It is the business of the future to be dangerous and it is among the merits of science that it equips the future for its duties.