Strength of mind is exercise, not rest.

Imagination continually outruns the creature it inhabits.

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

Brains are the only things worth having in this world.

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.

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

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

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

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.

We need strength, we need energy, we need quickness, and we need brain in this country to turn it around.

Not all heads have a brain.

The brain may be regarded as a kind of parasite of the organism, a pensioner, as it were, who dwells with the body.

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