What gunpowder did for war the printing press has done for the mind.

Political convulsions, like geological upheavings usher in new epochs of the world's progress.

Revolutions never go backwards.

We measure genius by quality, not by quantity.

What is defeat? Nothing but education, nothing but the first step to something better.

Two kinds of men generally best succeed in political life; men of no principle, but of great talent; and men of no talent, but of one principle - that of obedience to their superiors.

War and Niagara thunder to a music of their own.