“Bless those who persecute you, bless and do not curse them.” (Rom 12:14)
How does a Christian do this? Calvin’s words are insightful:
“Arduous is this, I admit, and wholly opposed to the nature of man; but there is nothing too arduous to be overcome by the power of God, which shall never be wanting to us, provided we neglect not to seek for it.”
God is the one who provides the power to love and bless those who persecute us. And he helps us also to reject bitterness in our hearts:
“But God by his word not only restrains our hands from doing evil, but also subdues the bitter feelings within; and not only so, but he would have us to be solicitous for the well-being of those who unjustly trouble us and seek our destruction.”
(Calvin commentary on Romans 12:14).