III. The New Law or the Law of the Gospel

1968
The Law of the Gospel fulfills the commandments of the Law. the Lord’s Sermon
on the Mount, far from abolishing or devaluing the moral prescriptions of the
Old Law, releases their hidden potential and has new demands arise from them:
it reveals their entire divine and human truth. It does not add new external
precepts, but proceeds to reform the heart, the root of human acts, where man
chooses between the pure and the impure,²² where faith, hope, and
charity are formed and with them the other virtues. the Gospel thus brings the
Law to its fullness through imitation of the perfection of the heavenly Father,
through forgiveness of enemies and prayer for persecutors, in emulation of the
divine generosity.²³

From The Catechism of the Catholic Church – rosary.team

Original Link: https://www.vatican.va/archive/ENG0015/__P6W.HTM