Too bad you don't read Greek, Hermann. Augustine formulated the Western concept of original sin, the "guilt" of Adam's sin being inherited. The East holds and held that we have inherited a fallen nature, a propensity to do sin, from Adam. Each person's sins are his or her own. It is not a legalistic, guilt thing.
Its getting late. Perhaps more later, if there's an interest. This is an extensive and complicated subject but one probably worth investigation because these differing beliefs about what the sin of Adam really means for us goes to the heart of a number of theological differences between the East and the West.
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Simple question again, are the souls of newly concevied unborn children infused with grace or bereft of grace?
This has nothing to do with reading Greek, and it cuts directly to the heart of the matter.