Imagination continually outruns the creature it inhabits.

The mind of man is capable of anything.

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

Imagination is the secret and marrow of civilization. It is the very eye of faith.

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

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

Your mind’s got to eat, too.

Brains are the only things worth having in this world.

Strength of mind is exercise, not rest.

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

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

What a torture to talk to filled heads that allow nothing from the outside to enter them.

It is far, far better and much safer to have a firm anchor in nonsense than to put out on the troubled seas of thought.