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.

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

Do not be bullied out of your common sense by the specialist; two to one, he is a pedant.

The world's great men have not commonly been great scholars, nor its great scholars great men.

No families take so little medicine as those of doctors, except those of apothecaries.

The best servant does his work unseen.

Truth is tough. It will not break, like a bubble, at a touch; nay, you may kick it about all day like a football, and it will be round and full at evening.