If the Pentateuch be true, religious persecution is a duty. The dungeons of the Inquisition were temples, and the clank of every chain upon the limbs of heresy was music in the ear of God. If the Pentateuch was inspired, every heretic should be destroyed; and every man who advocates a fact inconsistent with the sacred book, should be consumed by sword and flame.In the Old Testament no one is told to reason with a heretic, and not one word is said about relying upon argument, upon education, nor upon intellectual development—nothing except simple brute force. Is there to-day a christian who will say that four thousand years ago, it was the duty of a husband to kill his wife if she differed with him upon the subject of religion? Is there one who will now say that, under such circumstances, the wife ought to have been killed? Why should God be so jealous of the wooden idols of the heathen? Could he not compete with Baal? Was he envious of the success of the Egyptian magicians? Was it not possible for him to make such a convincing display of his power as to silence forever the voice of unbelief? Did this God have to resort to force to make converts? Was he so ignorant of the structure of the human mind as to believe all honest doubt a crime? If he wished to do away with the idolatry of the Canaanites, why did he not appear to them? Why did he not give them the tables of the law? Why did he only make known his will to a few wandering savages in the desert of Sinai? Will some theologian have the kindness to answer these questions? Will some minister, who now believes in religious liberty, and eloquently denounces the intolerance of Catholicism, explain these things; will he tell us why he worships an intolerant God? Is a god who will burn a soul forever in another world, better than a christian who burns the body for a few hours in this? Is there no intellectual liberty in heaven? Do the angels all discuss questions on the same side? Are all the investigators in perdition? Will the penitent thief, winged and crowned, laugh at the honest folks in hell? Will the agony of the damned increase or decrease the happiness of God? Will there be, in the universe, an eternal auto da fe?

~ 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