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.

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

What is outside my mind means nothing to it.

Brains are the only things worth having in this world.

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

Not all heads have a brain.

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

Though this be madness, yet there is method in’t.

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

“I think, therefore I am” is the statement of an intellectual who underrates toothaches.

Understanding is a very dull occupation.

The highest possible stage in moral culture is when we recognize that we ought to control our thoughts.

From a man’s face, I can read his character. If I can see him walk, I know his thoughts.