Whenever you stand praying, forgive, if you have anything against anyone, so that your Father who is in heaven will also forgive you your transgressions. Mark 11:25
When you pray, forgive. It opens the flow of forgiveness to us from God. In our physical makeup, whenever there is a blockage, the result is pain. In our spiritual makeup, this can be a blockage that causes even more pain. The healthy flow of grace is not up to God, it is not up to our adversaries, it is up to us. Forgiveness makes it all work.