Democracy is still upon its trial. The civic genius of our people is its only bulwark.

Theory must mediate between all previous truths and certain new experiences

The self-same atoms which, chaotically dispersed, made the nebula, now, jammed and temporarily caught in peculiar positions, form our brains; and the 'evolution' of brains, if understood, would be simply the account of how the atoms came to be so caught and jammed.

Men habitually use only a small part of the power which they actually possess.

Philosophy lives in words, but truth and fact well up into our lives in ways that exceed verbal formulation.

The lunatic's visions of horror are all drawn from the material of daily fact. Our civilization is founded on the shambles, and every individual existence goes out in a lonely spasm of helpless agony.

The function of ignoring, of inattention, is as vital a factor in mental progress as the function of attention itself.