Bless them who persecute you: bless, and curse not.
All Commentaries on Romans 12:14 Go To Romans 12
Caesarius of Arles
AD 542
How can the Scriptures, which forbid us to curse, contain so many curses themselves? Those curses are not spoken by a person who desires their fulfillment but merely foretell the fact. They do not want this to befall sinners, but because they will doubtless come to pass these curses are proved to be prophecies.
