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

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

Your mind’s got to eat, too.

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

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

Brains are the only things worth having in this world.

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

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

What is the hardest task in the world? To think.

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

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

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

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