The only foes that threaten America are the enemies at home, and these are ignorance, superstition and incompetence.

So long as governments set the example of killing their enemies, private individuals will occasionally kill theirs.

A retentive memory may be a good thing, but the ability to forget is the true token of greatness.

Rivalry is the life of trade, and the death of the trader.

Enthusiasm is the great hill-climber.

History: a collection of epitaphs.

One can play comedy, two are required for melodrama, but a tragedy demands three.