ISB ~ Romans 7 v23

the law of sin:Traditionally called concupiscence, which is the inclination of fallen man to misuse his free will in sinful and selfish ways. It manifests itself as an unremitting desire for pleasure, power, and possessions. Even the baptized have to wrestle with this inner force, although Paul insists that the Spirit can give us victory over its unmanageable urges (8:2, 13). So concupiscence remains in the believer, but it need not rule us like a tyrant (6:12-14) (CCC 405, 1426, 2520).