Understanding is a very dull occupation.

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

Every thought is, strictly speaking, an afterthought.

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

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

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

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

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

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.

Don’t lose your mind unless you have paid for it.

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

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

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