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

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

Is there no way out of the mind?

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

To be too conscious is an illness—a real thoroughgoing illness.

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

Understanding is a very dull occupation.

What is outside my mind means nothing to it.

As is the face, so is the mind.

Every thought is, strictly speaking, an afterthought.

Not all heads have a brain.

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

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.