What is outside my mind means nothing to it.

Imagination continually outruns the creature it inhabits.

The most potent weapon in the hands of the oppressor is the mind of the oppressed.

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

Strength of mind is exercise, not rest.

A mind lively and at ease can do with seeing nothing, and can see nothing that does not answer.

It is far, far better and much safer to have a firm anchor in nonsense than to put out on the troubled seas of thought.

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

The march of the human mind is slow.

Brains are the only things worth having in this world.

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

The universe is an object of thought at least as much as it is a means of satisfying needs.

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