Every thought is, strictly speaking, an afterthought.

Strength of mind is exercise, not rest.

Your mind’s got to eat, too.

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

In psychoanalysis nothing is true except the exaggerations.

Imagination continually outruns the creature it inhabits.

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

We need strength, we need energy, we need quickness, and we need brain in this country to turn it around.

The brain is an unreliable organ, it is monstrously great, monstrously developed. Swollen, like a goiter.

What is the hardest task in the world? To think.

As is the face, so is the mind.

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

Is there no way out of the mind?