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

my mind is
a big hunk of irrevocable nothing

Imagination continually outruns the creature it inhabits.

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

The mind of man is capable of anything.

Brains are the only things worth having in this world.

The universe is an object of thought at least as much as it is a means of satisfying needs.

Is there no way out of the mind?

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

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

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

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.

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