Setenta veces siete

Bud's daughter died in the Oklahoma City bombing. Karla Faye Tucker killed Ron's sister with a pickax. Carol's husband committed adultery. Delf backed a truck over his one-year-old son. Marietta's daughter was kidnapped and murdered. Josef escaped the Holocaust. Julie's husband molested their daughter. Steven was shot and paralyzed for life. Can they forgive? Why would they? What difference could it make?