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

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

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

Brains are the only things worth having in this world.

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

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

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

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

Is there no way out of the mind?

What is outside my mind means nothing to it.

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

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

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