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

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

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

The mind of man is capable of anything.

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

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

Strength of mind is exercise, not rest.

Brains are the only things worth having in this world.

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

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

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

A mind lively and at ease can do with seeing nothing, and can see nothing that does not answer.

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.