ISB ~ Romans 12 v20

if your enemy:A reference to Prov 25:2122.

• The meaning of the Proverb is mysterious, but it seems to indicate that serving an enemy stores up his future punishment so long as he continues in his ways.

• Heaping coals of kindness on one who has wronged you can cure him of vices, burn away his malice, and move him to repentance (St. Jerome, Homilies on the Psalms 41).