The glory of science is, that it is freeing the soul, breaking the mental manacles, getting the brain out of bondage, giving courage to thought, filling the world with mercy, justice, and joy.

Labor is the only prayer that Nature answers: It is the only prayer that deserves an answer—good, honest, noble work.

If abuses are destroyed, man must destroy them. If slaves are freed, man must free them. If new truths are discovered, man must discover them. If the naked are clothed; if the hungry are fed; if justice is done; if labor is rewarded; if superstition is driven from the mind; if the defenseless are protected, and if the right finally triumphs, all must be the work of man. The grand victories of the future must be won by man, and by man alone.

They say that when god was in Jerusalem he forgave his murderers, but now he will not forgive an honest man for differing with him on the subject of the Trinity. They say that God says to me, "Forgive your enemies." I say, "I do;" but he says, "I will damn mine." God should be consistent. If he wants me to forgive my enemies he should forgive his. I am asked to forgive enemies who can hurt me. God is only asked to forgive enemies who cannot hurt him. He certainly ought to be as generous as he asks us to be.

But honest men do not pretend to know; they are candid and sincere; they love the truth; they admit their ignorance, and they say, We do not know.

In the republic of mediocrity, genius is dangerous.

There are some truths, however, that we should never forget: Superstition has always been the relentless enemy of science; faith has been a hater of demonstration; hypocrisy has been sincere only in its dread of truth, and all religions are inconsistent with mental freedom.