Longtime practicing Catholic who is having trouble recently understanding Original Sin.
How am I, or anyone, born with sin if we didn’t have an opportunity to yet choose good or evil? And if I am born with sin, where do I get it from? How is it transmitted to me?
Original sin, the fault of Adam, is an inherited sin and it is transmitted to us from Adam, the first man and father of the whole human race, by descent from him. It is transmitted by descent in the same way an actual sin of some individual man is transmitted from his soul and will to some member/s of his body. For example, a murder that the hand commits. The CCC #404 says “How did the sin of Adam become the sin of all his descendants? The whole human race is in Adam ‘as one body of one man’.” The footnote here points us to St Thomas Aquinas and his work ‘De Malo’. St Thomas says the same thing in his Summa Theologica, Pt. I-II, Q. 81, art. 1. Read what he says here especially in the body of the article following “Therefore we must explain the matter otherwise…”. It is a remarkable insight into the mystery of original sin. Below is a link to Question 81, article 1:
https://isidore.co/aquinas/english/summa/FS/FS081.html#FSQ81OUTP1
In the article and as the CCC references, St Thomas says “Accordingly the multitude of men born of Adam, are as so many members of one body.” As you read the rest of the article, keep in mind the similarities here with the doctrine of Jesus Christ, the new Adam, and the Mystical Body of Christ. Through baptism, we are incorporated into Christ’s Mystical Body and become members of it and thus participate in Christ’s merits, grace, and the sacrifice of his body and blood on the cross for our salvation.
If God creates my soul, does he create it with Original Sin?
No, God is not the cause of sin. Original sin is the sin of our first parents, Adam and Eve, and principally Adam. God creates the soul without the supernatural original gift of holiness and justice and sanctifying grace. Original sin in us is essentially the privation of the original gifts of holiness and justice and sanctifying grace.
That wouldn’t make sense. If God creates my soul without Original Sin, then when does it enter?
It enters at conception when God infuses the soul into the material our parents provide us for our body which material originally comes from our first parents by descent from them. Original sin is transmitted from our first parents and principally from Adam, the first human being, by descent from them. It spreads from the flesh or bodily material which our parents provide for us to the soul.