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

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

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

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

As is the face, so is the mind.

There is no female mind. The brain is not an organ of sex. As well speak of a female liver.

Sooner or later if the activity of the mind is restricted anywhere, it will cease to function even where it is allowed to be free.

The mind of man is capable of anything.

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

Imagination continually outruns the creature it inhabits.

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

Madness need not be all breakdown. It may also be breakthrough.

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