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.

The human mind is an evolutionary product, just like the human body.

Understanding is a very dull occupation.

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

Imagination continually outruns the creature it inhabits.

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

The sleep of reason produces monsters.

The march of the human mind is slow.

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.

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

As is the face, so is the mind.