Every thought is, strictly speaking, an afterthought.

What is outside my mind means nothing to it.

Understanding is a very dull occupation.

Any man could, if he were so inclined, be the sculptor of his own brain.

The march of the human mind is slow.

Your mind’s got to eat, too.

The mind is not, I know, a highway but a temple, and its doors should not be carelessly left open.

The most potent weapon in the hands of the oppressor is the mind of the oppressed.

If anything affects your eye, you hasten to have it removed; if anything affects your mind, you postpone the cure for a year.

Imagination is the secret and marrow of civilization. It is the very eye of faith.

In psychoanalysis nothing is true except the exaggerations.

What the brain does by itself is infinitely more fascinating and complex than any response it can make to chemical stimulation.

There is no female mind. The brain is not an organ of sex. As well speak of a female liver.