14 Bless those who persecute you; bless and do not curse. 15 Rejoice with those who rejoice; mourn with those who mourn. 16 Live in harmony with one another. Do not be proud, but be willing to associate with people of low position. Do not be conceited.
17 Do not repay anyone evil for evil. Be careful to do what is right in the eyes of everybody. 18 If it is possible, as far as it depends on you, live at peace with everyone. 19 Do not take revenge, my friends, but leave room for God's wrath, for it is written: "It is mine to avenge; I will repay," says the Lord. 20 On the contrary:
"If your enemy is hungry, feed him;
if he is thirsty, give him something to drink.
In doing this, you will heap burning coals on his head." 21Do not be overcome by evil, but overcome evil with good.
Try to do that in your own stength. I don't think it's possible.