All necessary truth is its own evidence.

Cunning is strength withheld.

The kitchen clock is more convenient than sidereal time. We must use the popular category, as we do by the Linnæan classification, for convenience, and not as exact and final. Otherwise, we are presently confounded, when the best-settled traits of one race are claimed by some new ethnologist as precisely characteristic of the rival tribe.

Two sorts of writers possess genius: those who think, and those who cause others to think.

Heaven sometimes hedges a rare character about with ungainliness and odium, as the burr that protects the fruit.

It is one soul which animates all men.

Never try to make anyone like you: you know, and God knows, that one of you is enough.