What is outside my mind means nothing to it.

In psychoanalysis nothing is true except the exaggerations.

Not all heads have a brain.

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

The real question is not whether machines think but whether men do.

Every thought is, strictly speaking, an afterthought.

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

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.

Don’t lose your mind unless you have paid for it.

The highest possible stage in moral culture is when we recognize that we ought to control our thoughts.

Brains are the only things worth having in this world.

The mind of man is capable of anything.