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

Brains are the only things worth having in this world.

What a torture to talk to filled heads that allow nothing from the outside to enter them.

Not all heads have a brain.

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

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.

Understanding is a very dull occupation.

Every thought is, strictly speaking, an afterthought.

What is outside my mind means nothing to it.

The march of the human mind is slow.

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

The mind of man is capable of anything.

We need strength, we need energy, we need quickness, and we need brain in this country to turn it around.