Speech is the mark of humanity. It is the normal terminus of thought.

The limits of thought are not so much set from outside, by the fullness or poverty of experiences that meet the mind, as from within, by the power of conception, the wealth of formulative notions with which the mind meets experiences.

Religion, even the most primitive and superstitious, is inevitably a beginning of culture. It is not possible without some kind of symbolic expression ... and begets dramatic gesture, dance, and chant.

Common-sense knowledge is prompt, categorical, and inexact.

The way a question is asked limits and disposes the ways in which any answer to it-right or wrong-may be given.

Most new discoveries are suddenly-seen things that were always there. A new idea is a light that illuminates presences which simply had no form before the light fell on them.

Fire is a natural symbol of life and passion, though it is the one element in which nothing can actually live.