II Corinthians 2: 10-11 ” If you forgive anyone, I also forgive him. And what I have forgiven – if there was anything to forgive – I have forgiven in the sight of Christ for your sake, in order that Satan might not outwit us. For we are not unaware of his schemes.”
In Paul’s letter to the Church in Corinth he’s stressing the need for forgiveness. One of Satan’s favorite tricks is to draw us into a attitude of unforgiveness towards others. He exploits our feelings of resentment and anger, and sadly our soul deteriorates as bitterness takes over.