As is the face, so is the mind.

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

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

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

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

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

Every thought is, strictly speaking, an afterthought.

Understanding is a very dull occupation.

The march of the human mind is slow.

To be too conscious is an illness—a real thoroughgoing illness.

Is there no way out of the mind?

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

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