Imagination continually outruns the creature it inhabits.

Not all heads have a brain.

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

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

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

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

As is the face, so is the mind.

The march of the human mind is slow.

Strength of mind is exercise, not rest.

The real question is not whether machines think but whether men do.

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

The mind of man is capable of anything.

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