The mind of man is capable of anything.

The universe is an object of thought at least as much as it is a means of satisfying needs.

The sleep of reason produces monsters.

Strength of mind is exercise, not rest.

Imagination continually outruns the creature it inhabits.

my mind is
a big hunk of irrevocable nothing

Your mind’s got to eat, too.

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

The human mind is an evolutionary product, just like the human body.

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

Understanding is a very dull occupation.

In psychoanalysis nothing is true except the exaggerations.

The brain may be regarded as a kind of parasite of the organism, a pensioner, as it were, who dwells with the body.