My friend Célestin lost six family members, including his brother, in the Rwandan genocide. One day a man came to Célestin to be baptized wearing a shirt he recognized as having belonged to his deceased brother. When Célestin asked about it, the man said his relative killed the guy who wore it. Célestin wanted to drown this person instead of baptizing him. But he remembered that Jesus died for both of them. Today Célestin and that man he baptized—the brother of his own brother’s murderer—serve together as ministry partners. Célestin went on to write his doctoral dissertation on forgiveness, coauthoring the book Forgiving As We’ve Been Forgiven: Community Practices for Making…