Commentary on Romans
Diodorus of Tarsus
Sin was in the world before the law of Moses came, and it was counted, though not according to that law. Rather it was counted according to the law of nature, by which we have learned to distinguish good and evil. This was the law of which Paul spoke above.
Adam was a type of Christ not with respect to his sin or his righteousness—in this respect the two men were opposites—but with respect to the effects of what he did. For just as Adam's sin spread to all men, so Christ's life also spread to all men. Adam was also a type of Christ in another respect. For just as he was the head of Eve, in that he was her husband, so also Christ, being its bridegroom, is the head of the church.
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