Brains are the only things worth having in this world.

The mind of man is capable of anything.

As is the face, so is the mind.

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

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

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

The march of the human mind is slow.

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

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

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

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

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.