Intellectual liberty [is] the right to think right and the right to think wrong. Thought is the means by which we endeavor to arrive at truth.

Blasphemy is an epithet bestowed by superstition upon common sense.

Religion can never reform mankind because religion is slavery.

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

Nothing could be more idiotic and absurd than the doctrine of the trinity.

I do not believe that the tendency is to make men and women brave and glorious when you tell them that there are certain ideas upon certain subjects that they must never express; that they must go through life with a pretence as a shield; that their neighbors will think much more of them if they will only keep still; and that above all is a God who despises one who honestly expresses what he believes.

We need men with moral courage to speak and write their real thoughts, and to stand by their convictions, even to the very death.