What is outside my mind means nothing to it.

The brain is an unreliable organ, it is monstrously great, monstrously developed. Swollen, like a goiter.

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

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

The most potent weapon in the hands of the oppressor is the mind of the oppressed.

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.

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

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

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

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.

Strength of mind is exercise, not rest.

Brains are the only things worth having in this world.