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

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

Not all heads have a brain.

Understanding is a very dull occupation.

Every thought is, strictly speaking, an afterthought.

my mind is
a big hunk of irrevocable nothing

What is outside my mind means nothing to it.

Strength of mind is exercise, not rest.

Sooner or later if the activity of the mind is restricted anywhere, it will cease to function even where it is allowed to be free.

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.

As is the face, so is the mind.

What the brain does by itself is infinitely more fascinating and complex than any response it can make to chemical stimulation.

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