88 And this is the course and ground of justice, that since the action of body and soul is common to both (for what the soul has conceived the body has carried out), each should come into judgment, and each should be either given over to punishment or reserved for glory. For it would seem almost inconsistent that, since the law of the mind fights against the law of the flesh, and the mind often, when sin dwelling in man acts, does that which it hates; the mind guilty of a fault shared by another should be subjected to penalty, and the flesh, the author of the evil, should enjoy rest: and that should alone suffer which had not sinned alone, or should alone attain to glory, not having fought alone with the help of grace.
Source: On the Death of Satyrus (New Advent)