With regard to the question, “How would a Protestant who doesn’t believe in the Immaculate Conception respond when asked how Jesus’ humanity was preserved from contracting original sin?” I actually hinted at the answer in a couple of prior posts:
…Adam and Eve were only “preserved” from sin in the sense that there was no original sin for them to contract in their creation. They had to actually commit a sin to contract sin. And according to the CCC, this sin that they contract would be passed down by propogation to their progeny, and I would expect this would hold true 100% of the time unless something different happened to throw off the natural course of propogation.
…do you think that God can willy-nilly break the rule that He Himself established as to the transmission of original sin, or is it possible that God is constrained by His own character so as not to break the natural chain of transmission of original sin unless He also breaks the natural chain of propogation of human life?
How is human life naturally propogated? By sexual intercourse. So it stands to reason that everyone who is conceived in the usual way – through sexual intercourse – is bound to contract original sin.
Hence, one famous Protestant writer wrote, “Even the lawful intercourse of the wedded cannot take place…without sin. For he had not been born of adultery or fornication, but of lawful wedlock, who said, ‘Behold I was conceived in iniquities, and in sin my mother brought me forth.’ For, knowing himself to have been conceived in iniquities, he groaned for having been born in sin, because the tree bears in its branch the vicious humour which it has drawn from its root.” (Letter to Augustine, Bishop of the Angli)
How was Mary conceived? Naturally – i.e., by sexual intercourse. Which means she contracted original sin, just like anyone else who was ever conceived naturally, like you or me.
So why didn’t Jesus contract original sin? Because He wasn’t conceived naturally.
“Truly foreign to this nativity,” wrote a second famous Protestant writer, “is that which we read of all others, ‘no one is clean from stain, not even the infant who has lived but one day upon earth.’ Nothing therefore of the lust of the flesh has passed into that peerless nativity, nothing of the law of sin has entered.” (1st Sermon on the Nativity) How so? Because, again according to this Protestant writer, “By a new nativity He was begotten, conceived by a Virgin, born of a Virgin, without paternal desire, without injury to the mother’s chastity…without male seed Christ was conceived of a Virgin, who was fecundated not by human intercourse but by the Holy Spirit. And whereas in all mothers conception does not take place without stain of sin, this one received purification from the Source of her conception. For no taint of sin penetrated, where no intercourse occurred. Her unsullied virginity knew no lust when it ministered the substance. The Lord took from His mother our nature, not our fault.” (2nd Sermon on the Nativity) Was it really necessary that Jesus be born by this “new nativity” in order to be free from original sin? Absolutely, for the writer says, “That one of the sons of Adam should be born free and innocent of original transgression…was not permitted by natural generation…because there could be no offspring from our faulty stock without seed, of which the Scripture saith, ‘Who can make a clean thing conceived of an unclean seed?’” (8th Sermon on the Nativity)
So there you have it. Oh, by the way, these two famous Protestant writers? Pope Gregory the Great and Pope Leo the Great.
When I was young, and someone told me the gospel for the first time, it went kind of like this: “Adam and Eve sinned, and because they sinned, we all inherit original sin from Adam, and that’s why we are sinners. But Jesus, the Son of God, came down from heaven and was born of a virgin” – at which point my young brain said, “Born of a virgin. Why?” – “and lived a life without sin” – at which point my young brain said, “Oh, that’s why. Because by being born of a virgin, he didn’t inherit original sin and become a sinner from the get-go. Which means original sin must be something passed down from father to child. Sure, that makes sense.” And that’s
exactly what the Church taught for centuries – original sin was passed down from Adam because Adam’s seed carried the taint of original sin in it, and his sons’ seed in turn carried original sin down to the next generation, and so on, and so on, fathers passing original sin down to their children via their seed, generation after generation, until
finally a child is conceived
without male seed. That child was Jesus, and because he was conceived miraculously, apart from sexual intercourse, and without male seed, he alone was free from original sin.
–Mike