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

Understanding is a very dull occupation.

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

The highest possible stage in moral culture is when we recognize that we ought to control our thoughts.

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

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

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

Imagination continually outruns the creature it inhabits.

What the brain does by itself is infinitely more fascinating and complex than any response it can make to chemical stimulation.

Though this be madness, yet there is method in’t.

my mind is
a big hunk of irrevocable nothing

Your mind’s got to eat, too.

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