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

The sleep of reason produces monsters.

In psychoanalysis nothing is true except the exaggerations.

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

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

The mind of man is capable of anything.

Understanding is a very dull occupation.

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

Madness need not be all breakdown. It may also be breakthrough.

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

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

What is outside my mind means nothing to it.

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