What is outside my mind means nothing to it.

Any man could, if he were so inclined, be the sculptor of his own brain.

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

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

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

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

We need strength, we need energy, we need quickness, and we need brain in this country to turn it around.

As is the face, so is the mind.

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

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

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

Sanity is madness put to good uses; waking life is a dream controlled.

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