Do not repay anyone evil for evil. Carefully consider what is right in the eyes of everybody. If it is possible on your part, live at peace with everyone. Do not be overcome by evil, but overcome evil with good.—Romans 12:17-18; 21
We must confess unrighteous anger as sin and then begin to deal with it immediately. Anger is often a response to hurt and care must be taken not to excuse or defend it in the name of justice. Even when someone has sinned against you, it’s important to realize that holding onto anger in response is also a sin. Scripture tells us to overcome evil with good, not to repay it.
Some people want to hang on to ill feelings, but nursing a resentful attitude isn’t sustainable; anger must be put aside. If we retain our “right” to hold grudges, we can’t expect to live in the new nature Christ has created for us.
The place where we will find strength is in our new Christlike personality. Our responsibility is to put it on. He invites us to cooperate with Him in the process of transformation. With each step of obedience, the peace of Christ will increase and anger will diminish.