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

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

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

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

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

Strength of mind is exercise, not rest.

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

Your mind’s got to eat, too.

The mind is not, I know, a highway but a temple, and its doors should not be carelessly left open.

Imagination continually outruns the creature it inhabits.

What is outside my mind means nothing to it.

The march of the human mind is slow.

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