Never pay back evil with more evil. Do things in such a way that everyone can see you are honorable. Romans 12:17 NLT
It is the love of Christ in us that gives us the ability to show love to those that are out to harm us. Love returns good for evil. It brings blessings, not destruction, to others. Paul admonishes us to live a life that is pure and honest, so others will see that Christ lives in our hearts.