Insanity is often the logic of an accurate mind overtasked

Insanity is often the logic of an accurate mind overtasked. Good mental machinery ought to break its own wheels and levers, if anything is thrust among them suddenly which tends to stop them or reverse their motion. A weak mind does not accumulate force enough to hurt itself; stupidity often saves a man from going mad.

A man's mind is stretched by a new idea or sensation, and never shrinks back to its former dimensions.

The mind of a bigot to the pupil of the eye; the more light you pour on it, the more it contracts.

Many ideas grow better when transplanted into another mind than in the one where they sprang up.

A mind that is stretched by a new experience can never go back to its old dimensions.