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

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

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

Not all heads have a brain.

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

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

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

Your mind’s got to eat, too.

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

Every thought is, strictly speaking, an afterthought.

Any man could, if he were so inclined, be the sculptor of his own brain.

As is the face, so is the mind.

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