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

In psychoanalysis nothing is true except the exaggerations.

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

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

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

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

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

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

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

Understanding is a very dull occupation.

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

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.

Not all heads have a brain.