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.

The march of the human mind is slow.

Not all heads have a brain.

Imagination continually outruns the creature it inhabits.

Understanding is a very dull occupation.

Strength of mind is exercise, not rest.

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.

The mind of man is capable of anything.

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

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

What is outside my mind means nothing to it.

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

As is the face, so is the mind.