All of the Ten Commandments that are good were old; all that were new art foolish. If Jehovah had been civilized he would have left out the commandment about keeping the Sabbath, and in its place would have said: "Thou shalt not enslave thy fellow-men." He would have omitted the one about swearing, and said: "The man shall have but one wife, and the woman but one husband." He would have left out the one about graven images, and in its stead would have said: "Thou shalt not wage wars of extermination, and thou shalt not unsheathe the sword except in self-defence.

There is no necessity for going to the church and hearing the same story forever. Let the minister write what he wishes to say. Let him publish it. If it is worth buying, people will read it. It is hardly fair to get them in a church in the name of duty and there inflict upon them a sermon that under no circumstances they would read...the idea of going fifty-two days in a year to hear anybody on the same subject is absurd.

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.

It is better to deserve without receiving than to receive without deserving

When a man really believes that it is necessary to do a certain thing to be happy forever, or that a certain belief is necessary to ensure eternal joy, there is in that man no spirit of concession. He divides the whole world into saints and sinners, into believers and unbelievers, into God's sheep and Devil's goats, into people who will be glorified and people who are damned.

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

I have no reverence for any book that teaches a doctrine contrary to my reason; no reverence for any book that teaches a doctrine contrary to my heart; and, no matter how old it is, no matter how many have believed it, no matter how many have died on account of it, no matter how many live for it, I have no reverence for that book, and I am glad of it.