Liberty a word without which all other words are vain.

The man who does not do his own thinking is a slave, and is a traitor to himself and to his fellow-men.

Twenty years after the death of Luther there were more Catholics than when he was born. And twenty years after the death of Voltaire there were millions less than when he was born.

The first step is for man to cease to be the slave of man. The second, is to cease to be the slave of the monsters of his own creation, the ghosts and phantoms of the air.

The hands that help are better far than lips that pray.

Intellect, without heart, is infinitely cruel. . . .

He who dishonors himself [by lying about his opinions] for the sake of being honored by others will find that two mistakes have been made - one by himself, and the other, by the people.