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

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

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

“I think, therefore I am” is the statement of an intellectual who underrates toothaches.

In psychoanalysis nothing is true except the exaggerations.

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

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

Though this be madness, yet there is method in’t.

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

Understanding is a very dull occupation.

Your mind’s got to eat, too.

Imagination continually outruns the creature it inhabits.

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