I've found that this passage by Thomas Paine, from his "Of the Religion of Deism Compared With the Christian Religion" blows what they have to say about philosophy right out of the water.
"... But the Church of Rome could not erect the person called Jesus into a Savior of the world without making the allegories in the book of Genesis into fact, though the New Testament, as before observed, gives no authority for it. All at once the allegorical tree of knowledge became, according to the Church, a real tree, the fruit of it real fruit, and the eating of it sinful.
As priestcraft was always the enemy of knowledge, because priestcraft supports itself by keeping people in delusion and ignorance, it was consistent with its policy to make the acquisition of knowledge a real sin.
The Church of Rome having done this, it then brings forward Jesus the son of Mary as suffering death to redeem mankind from sin, which Adam, it says, had brought into the world by eating the fruit of the tree of knowledge. But as it is impossible for reason to believe such a story, because it can see no reason for it, nor have any evidence of it, the Church then tells us we must not regard our reason, but must believe, as it were, and that through thick and thin, as if God had given man reason like a plaything, or a rattle, on purpose to make fun of him.
Reason is the forbidden tree of priestcraft, and may serve to explain the allegory of the forbidden tree of knowledge, for we may reasonably suppose the allegory had some meaning and application at the time it was invented. It was the practice of the Eastern nations to convey their meaning by allegory, and relate it in the manner of fact. Jesus followed the same method, yet nobody ever supposed the allegory or parable of the rich man and Lazarus, the Prodigal Son, the ten Virgins, etc., were facts."
Italics and bolding mine.