Those who can be made to believe absurdities can be made to commit atrocities.

You write your name in the snow Yet say nothing.

Let us therefore reject all superstition in order to become more human; but in speaking against fanaticism, let us not imitate the fanatics: they are sick men in delirium who want to chastise their doctors. Let us assuage their ills, and never embitter them, and let us pour drop by drop into their souls the divine balm of toleration, which they would reject with horror if it were offered to them all at once.

A circumstance which has always appeared wonderful to me, is that such sublime discoveries should have been made by the sole assistance of a quadrant and a little arithmetic.

But in this country it is necessary, now and then, to put one admiral to death in order to inspire the others to fight.

The way to be a bore is to say everything.

We only half live when we only half think.