The Place of the Moral Law
...this model of love is a greater model of love than what is found in the Old Testament, since it was ontologically impossible for God to act in sacrificial love toward his people. In other words, it was the incarnation that made a suffering love possible, and therefore it was only after the incarnation that this heightened form of love could be required on the basis of Christ’s own example. Therefore, contrary to antinomianism, the New Testament heightens, not lessens, the place of the moral law in the life of the believer, for the indicative has been heightened through Christ’s mediatorial work.
Mark Jones, Antinomianism: Reformed Theology's Unwelcome Guest? (Phillipsburgs, New Jersey: P&R Publishing, 2013), 37-98