Day 260: Summary of the Moral Law

The New Law is the grace of the Holy Spirit received by faith in Christ, operating through charity. It finds expression above all in the Lord's Sermon on the Mount and uses the sacraments to communicate grace to us. CCC 1983

In today's reading, the Catechism gives an In Brief reviewing what has been covered over the past few days. I have nothing else to add.

I did appreciate some of the good commentary on this in the Catholic Catechism Vol III:

God has written the law in our hearts. And he gave us the Old Law because we did not read those things he wrote in our hearts, though we do know that there's such a thing as right and wrong. Our common humanity reveals that we all have consciences. We know when we have violated the good... Many of the heartaches we experience are because, for at least a moment, those around us or we ourselves dismissed God's "fatherly instruction" (CCC 1975). God gives us these commandments because he wants us to have life, freedom, and joy. (p. 36)