In his book on Adam's fall I. A. McFarland wrote that Augustine marked a
"transition from a loosely conceived, broadly ecumenial doctrine of the fall to a much more tightly formulated doctine of original sin...Augustine's thought decisively redirected Christian interpretation of the fall" (I.A. McFarland,
In Adam's Fall: A Meditation on the Christian doctrine of Original Sin, 32).
We will see that Augustine's theory of Original Sin was based on a basic misunderstanding of the following verses which speak of the results of Adam's eating of the Tree of the Knowledge of Good and Evil:
"And the LORD God said, Behold, the man is become as one of us, to know good and evil: and now, lest he put forth his hand, and take also of the tree of life, and eat, and live for ever: Therefore the LORD God sent him forth from the garden of Eden, to till the ground from whence he was taken. So he drove out the man; and he placed at the east of the garden of Eden Cherubims, and a flaming sword which turned every way, to keep the way of the tree of life" (Gen.3:22-24).
First, we can understand that Adam was created in a mortal body because in order for him to live for ever it was necessary for him to eat of the Tree of Life. That idea is supported by by the
Cambridge Bible for Schools and Colleges:
"Man must be prevented from eating of the Tree of Life, and so obtaining another prerogative of Divinity, that of immortality. Man is created mortal."
Henry Alford wrote that
"man was created subject to death" (Henry Alford,
The Book of Genesis and Part of the Book of Exodus; A Revised Edition [London: John Childs and Son, 1872], 19).
Gerald Bray said that
"Adam was not created as an immortal being, but in the garden of Eden he was protected against death. When he fell the protection was removed and he suffered the consequences as his nature was allowed to take its course " [
emphasis added] (Gerald Bray, "Sin in Historical Theology," in
Fallen: A Theology of Sin, 169).
We also know that when Adam ate of that tree his physical body did not undergo a change in his physical makeup. Albert Barnes wrote the following:
"The tree of the knowledge of good and evil effected a change, not in the physical constitution of man, but in his mental experience - in his knowledge of good and evil" (Albert Barnes, Barnes Notes on the Bible, Commentary at Gen.3:22).
There is absolutely no evidence that the physical body of Adam was changed in any way at all. He died physically because he was denied the very thing which would have allowed him to live for ever--the Tree of Life. Despite this Augustine mistakenly believed that when Adam sinned he "despoiled his body":
G.F. Wiggers quoted Augustine saying the following:
"If Adam had not sinned, he would not have been despoiled of his body, but would have been clothed with immortality and incorruptibility, that what is mortal should be swallowed up of life..." De Pec. Mer. I. 2, 4." [
emphasis added] (G.F. Wiggers,
An Historical Presentation of Augustinism and Pelagianism From the Original Sources [Andover, MA: Gould, Newman & Saxton, 1840], 92; A Reproduction by Forgotten Books).
John Calvin followed Augustine in thinking that Adam's body and his descendant's bodies are defiled as a result of concupisence, writing that
"everything which is in man, from the intellect to the will, from the soul even to the flesh, is defiled and pervaded with this concupiscence; or, to express it more briefly, that the whole man is in himself nothing else than concupiscence" (John Calvin,
Institutes of the Christian Religion; 2:1:8).
So we can see that the foundation of the theory of Original Sin was built on a false idea about what happened when Adam sinned. But many people still cling to the teaching found in this theory, a theory which was first formulated during the dark ages!