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

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

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

It is far, far better and much safer to have a firm anchor in nonsense than to put out on the troubled seas of thought.

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

If anything affects your eye, you hasten to have it removed; if anything affects your mind, you postpone the cure for a year.

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

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

What is outside my mind means nothing to it.

my mind is
a big hunk of irrevocable nothing

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

Your mind’s got to eat, too.

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