No one, in the world's whole history, ever attempted to substantiate a truth by a miracle. Truth scorns the assistance of miracle. Nothing but falsehood ever attested itself by signs and wonders. No miracle ever was performed, and no sane man ever thought he had performed one, and until one is performed, there can be no evidence of the existence of any power superior to, and independent of nature.

Intelligence is the only moral guide.

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.

I am anxious to give away information, for it is only by giving it away that you can keep it. When you have told it, you remember it. It is with information as it is with liberty, the only way to be dead sure of it is to give it to other people.

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

There is no evidence that God ever interfered in the affairs of man. The hand of earth is stretched uselessly towards heaven. From the clouds there comes no help.

The idea that there is a God who rewards and punishes, and who can reward, if he so wishes, the meanest and vilest of the human race, so that he will be eternally happy, and can punish the best of the human race, so that he will be eternally miserable, is subversive of all morality.