Periods of tranquillity are seldom prolific of creative achievement. Mankind has to be stirred up.

Common Sense

Simple solutions seldom are. It takes a very unusual mind to undertake analysis of the obvious.

Experience

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

Ideas

The vitality of thought is in adventure. Ideas won't keep. Something must be done about them. When the idea is new, its custodians have fervor, live for it, and if need be, die for it.

Philosophers and Philosophy

Philosophy is the product of wonder.

Speech

Speech is human nature itself, with none of the artificiality of written language.

Youth

The deepest definition of youth is life as yet untouched by tragedy.