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

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

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

Brains are the only things worth having in this world.

The march of the human mind is slow.

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

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

The mind of man is capable of anything.

In psychoanalysis nothing is true except the exaggerations.

Every thought is, strictly speaking, an afterthought.

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.

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

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