The most detestable wickedness, the most horrid cruelties, and the greatest miseries, that have afflicted the human race have had their origin in this thing called revelation, or revealed religion. It has been the most dishonourable belief against the character of the divinity, the most destructive to morality, and the peace and happiness of man, that ever was propagated since man began to exist. It is better, far better, that we admitted, if it were possible, a thousand devils to roam at large, and to preach publicly the doctrine of devils, if there were any such, than that we permitted one such impostor and monster as Moses, Joshua, Samuel, and the Bible prophets, to come with the pretended word of God in his mouth, and have credit among us.Whence arose all the horrid assassinations of whole nations of men, women, and infants, with which the Bible is filled; and the bloody persecutions, and tortures unto death and religious wars, that since that time have laid Europe in blood and ashes; whence arose they, but from this impious thing called revealed religion, and this monstrous belief that God has spoken to man? The lies of the Bible have been the cause of the one, and the lies of the Testament of the other.

~ Thomas Paine

Of course the theologians fought the facts found by the geologists, the scientists, and sought to sustain the sacred Scriptures. They mistook the bones of the mastodon for those of human beings, and by them proudly proved that there were giants in those days. They accounted for the fossils by saying that God had made them to try our faith, or that the Devil had imitated the works of the Creator.They answered the geologists by saying that the days in Genesis were long periods of time, and that after all the flood might have been local. They told the astronomers that the sun and moon were not actually, but only apparently, stopped. And that the appearance was produced by the reflection and refraction of light.They excused the slavery and polygamy, the robbery and murder upheld in the Old Testament by saying that the people were so degraded that Jehovah was compelled to pander to their ignorance and prejudice.In every way the clergy sought to evade the facts, to dodge the truth, to preserve the creed.At first they flatly denied the facts -- then they belittled them -- then they harmonized them -- then they denied that they had denied them. Then they changed the meaning of the inspired book to fit the facts. At first they said that if the facts, as claimed, were true, the Bible was false and Christianity itself a superstition. Afterward they said the facts, as claimed, were true and that they established beyond all doubt the inspiration of the Bible and the divine origin of orthodox religion.Anything they could not dodge, they swallowed and anything they could not swallow, they dodged.I gave up the Old Testament on account of its mistakes, its absurdities, its ignorance and its cruelty. I gave up the New because it vouched for the truth of the Old. I gave it up on account of its miracles, its contradictions, because Christ and his disciples believe in the existence of devils -- talked and made bargains with them. expelled them from people and animals.This, of itself, is enough. We know, if we know anything, that devils do not exist -- that Christ never cast them out, and that if he pretended to, he was either ignorant, dishonest or insane.

~ Robert G. Ingersoll

And when we say also that the Word, who is the first-birth of God, was produced without sexual union, and that He, Jesus Christ, our Teacher, was crucified and died, and rose again, and ascended into heaven, we propound nothing different from what you believe regarding those whom you esteem sons of Jupiter. For you know how many sons your esteemed writers ascribed to Jupiter: Mercury, the interpreting word and teacher of all; Aesculapius, who, though he was a great physician, was struck by a thunderbolt, and so ascended to heaven; and Bacchus too, after he had been torn limb from limb; and Hercules, when he had committed himself to the flames to escape his toils; and the sons of Leda, and Dioscuri; and Perseus, son of Danae; and Bellerophon, who, though sprung from mortals, rose to heaven on the horse Pegasus. For what shall I say of Ariadne, and those who, like her, have been declared to be set among the stars? And what of the emperors who die among yourselves, whom you deem worthy of deification, and in whose behalf you produce some one who swears he has seen the burning Caesar rise to heaven from the funeral pyre? And what kind of deeds are recorded of each of these reputed sons of Jupiter, it is needless to tell to those who already know. This only shall be said, that they are written for the advantage and encouragement of youthful scholars; for all reckon it an honourable thing to imitate the gods. But far be such a thought concerning the gods from every well-conditioned soul, as to believe that Jupiter himself, the governor and creator of all things, was both a parricide and the son of a parricide, and that being overcome by the love of base and shameful pleasures, he came in to Ganymede and those many women whom he had violated and that his sons did like actions. But, as we said above, wicked devils perpetrated these things. And we have learned that those only are deified who have lived near to God in holiness and virtue; and we believe that those who live wickedly and do not repent are punished in everlasting fire.

~ Justin Martyr

...I therefore hate the corrupt, slaveholding, women-whipping, cradle-plundering, partial and hypocritical Christianity of the land... I look upon it as the climax of all misnomers, the boldest of all frauds, and the grossest of all libels. Never was there a clearer case of 'stealing the livery of the court of heaven to serve the devil in.' I am filled with unutterable loathing when I contemplate the religious pomp and show, together with the horrible inconsistencies, which every where surround me. We have men-stealers for ministers, women-whippers for missionaries, and cradle-plunderers for church members. The man who wields the blood-clotted cowskin during the week fills the pulpit on Sunday, and claims to be a minister of the meek and lowly Jesus. . . . The slave auctioneer’s bell and the church-going bell chime in with each other, and the bitter cries of the heart-broken slave are drowned in the religious shouts of his pious master. Revivals of religion and revivals in the slave-trade go hand in hand together. The slave prison and the church stand near each other. The clanking of fetters and the rattling of chains in the prison, and the pious psalm and solemn prayer in the church, may be heard at the same time. The dealers in the bodies of men erect their stand in the presence of the pulpit, and they mutually help each other. The dealer gives his blood-stained gold to support the pulpit, and the pulpit, in return, covers his infernal business with the garb of Christianity. Here we have religion and robbery the allies of each other—devils dressed in angels’ robes, and hell presenting the semblance of paradise.

~ Frederick Douglass