By physical liberty I mean the right to do anything which does not interfere with the happiness of another. By intellectual liberty I mean the right to think and the right to think wrong.

To know that the Bible is the literature of a barbarous people, to know that it is uninspired, to be certain that the supernatural does not and cannot exist - all this is but the beginning of wisdom.

Just to the extent that the Bible was appealed to in matters of science, science was retarded; and just to the extent that science has been appealed to in matters of religion, religion has advanced - so that now the object of intelligent religionists is to adopt a creed that will bear the test and criticism of science.

Justice should remove the bandage from her eyes long enough to distinguish between the vicious and the unfortunate.

I do not believe in loving enemies; I have pretty hard work to love my friends. Neither do I believe in revenge. No man can afford to keep the viper of revenge in his heart. But I believe in justice, in self-defense.

Nothing is greater than to break the chains from the bodies of men, nothing nobler than to destroy the phantom of the soul.

Belief is not a matter of choice, but of conviction.