Our process model of forgiveness can be used with people of faith by adding themes common to that faith. For example, suppose a client is in the Work Phase of the forgiveness process. The task is to see the inherent worth of the one who offended. The counselor could ask, “Is the person who hurt you made in the image and likeness of God?”
There is no Christian imperative to forgive immediately. When Paul tells us not to let the sun go down on our anger, the Greek is parorgismos, an intensive kind of anger that could include revenge-seeking. He is not telling us to forgive immediately.