Doubt everything at least once, even the sentence "Two times two is four."

The most entertaining surface on earth is the human face.

Deliberate virtue is never worth much: The virtue of feeling or habit is the thing.

He who says he hates every kind of flattery, and says it in earnest, certainly does not yet know every kind of flattery.

Much reading has brought upon us a learned barbarism.

It is a great shame; most of our words are misused tools / which often still smell of the mud in which previous owners / desecrated them.

Probably no invention came more easily to man than heaven.