At the bottom of religious persecution is the doctrine of self-defence; that is to say, the defence of the soul. If the founder of Christianity had plainly said: 'It is not necessary to believe in order to be saved; it is only necessary to do, and he who really loves his fellow-men, who is kind, honest, just and charitable, is to be forever blest' - if he had only said that, there would probably have been but little persecution.

I am going to put the Bible out of business.

I love to think of the whole universe together as one eternal fact. I love to think that everything is alive; that crystallization is itself a step toward joy. I love to think that when a bud bursts into blossom: it feels a thrill. I love to have the universe full of feeling and full of joy, and not full of simple dead, inert matter, managed by an old bachelor for all eternity.

The Christians say, that among the ancient Jews, if you committed a crime you had to kill a sheep. Now they say 'charge it.' 'Put it on the slate.' The Savior will pay it. In this way, rascality is sold on credit, and the credit system in morals, as in business, breeds extravagance.

Religion can never reform mankind because religion is slavery.

Arguments cannot be answered by personal abuse; there is no logic in slander, and falsehood, in the long run, defeats itself.

The history of intellectual progress is written in the lives of infidels.