The sleep of reason produces monsters.

Your mind’s got to eat, too.

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

Is there no way out of the mind?

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

my mind is
a big hunk of irrevocable nothing

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

Strength of mind is exercise, not rest.

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

Every thought is, strictly speaking, an afterthought.

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

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

What is outside my mind means nothing to it.