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

The sleep of reason produces monsters.

What a torture to talk to filled heads that allow nothing from the outside to enter them.

Brains are the only things worth having in this world.

Understanding is a very dull occupation.

Is there no way out of the mind?

From a man’s face, I can read his character. If I can see him walk, I know his thoughts.

In psychoanalysis nothing is true except the exaggerations.

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

Every thought is, strictly speaking, an afterthought.

Brain, n. An apparatus with which we think that we think.

To be too conscious is an illness—a real thoroughgoing illness.

Sooner or later if the activity of the mind is restricted anywhere, it will cease to function even where it is allowed to be free.