Romanos 5

Romanos 5:5

The law was indeed given through Moses, and there it was determined by a heavenly rule what was to be done and what was to be avoided, but what it commanded was completed only by the grace of Christ. On the one hand, that law was able to point out sin, teaching justice and showing transgressors what they are charged with. On the other hand, the grace of Christ, poured out in the hearts of the faithful through the spirit of charity, brings it about that what the law commanded may be fulfilled. — Homilies on the Gospels 1.2