New Defender's Study Bible Notes
5:13 occasion to the flesh. There is an occasional danger in the misuse of the doctrine of grace—that is anti-nomianism (“against law”). Christian liberty might be so abused as to become libertinism, or license, and Paul must warn against that as well. In fact, the introduction of legalism would tend to split a church, with some anti-legalists going to the extreme of becoming anti-nomians, deliberately sinning “that grace may abound,” an idea from which Paul recoils in horror (Romans 6:1,2).
5:14 love thy neighbour. Note Leviticus 19:18. See also Christ’s affirmation of this truth in Matthew 22:39. The love which fulfills the law is not erotic love, of course, but unselfish love, of Christian charity (Greek, agape).