When we forgive, we are confessing that vengeance is God’s (Rom. 12:19). We don’t need to exact justice from a fellow believer because justice has already fallen at the cross. We don’t need to exact vengeance from an unbeliever because we know the sin against us will be judged in hell or, more hopefully, when the offender unites himself to the One who is “the propitiation for our sins, and not for ours only but also for the sins of the whole world” (1 Jn. 2:2).
Read the whole thing here: Moore to the Point – What Forgiveness Is and Isn’t.