The doctrine that future happiness depends upon belief is monstrous. It is the infamy of infamies. The notion that faith in Christ is to be rewarded by an eternity of bliss, while a dependence upon reason, observation and experience merits everlasting pain, is too absurd for refutation, and can be relieved only by that unhappy mixture of insanity and ignorance, called "faith." What man, who ever thinks, can believe that blood can appease God? And yet, our entire system of religion is based upon that belief. The Jews pacified Jehovah with the blood of animals, and according to the Christian system, the blood of Jesus softened the heart of God a little, and rendered possible the salvation of a fortunate few. It is hard to conceive how the human mind can give assent to such terrible ideas, or how any sane man can read the Bible and still believe in the doctrine of inspiration.
Robert Green Ingersoll, "The Liberty Of All"
If there is a God who will damn his children forever, I would rather go to hell than to go to heaven and keep the society of such an infamous tyrant. I make my choice now. I despise that doctrine. It has covered the cheeks of this world with tears. It has polluted the hearts of children, and poisoned the imaginations of men.... What right have you, sir, Mr. clergyman, you, minister of the gospel to stand at the portals of the tomb, at the vestibule of eternity, and fill the future with horror and with fear? I do not believe this doctrine, neither do you. If you did, you could not sleep one moment. Any man who believes it, and has within his breast a decent, throbbing heart, will go insane. A man who believes that doctrine and does not go insane has the heart of a snake and the conscience of a hyena.