Was then that which is good made death unto me? God forbid. But sin, that it might appear sin, working death in me by that which is good; that sin by the commandment might become exceedingly sinful.
All Commentaries on Romans 7:13 Go To Romans 7
Augustine of Hippo
AD 430
Here Paul elaborates on what he said [in verse ]. It is not that a good thing (i.e., the law) had become death for him but rather that sin worked death through the law’s goodness, i.e., that it became apparent whereas without the law it had lain hidden. For everyone recognizes that he is dead if he cannot fulfill a precept which he recognizes as just, and because of the criminal offense of the trespass he sins even more than he would have if it had not been forbidden. Before the coming of the law the offense was less, because without the law there is no transgression.