What is the most trustworthy indicator of a person who has authentically changed? How can you know—as much as one can understand objective, practical transformation? “He said he changed but did he?” Many folks have asked this question, and thankfully, Paul gives us our answers. But first, let me tell you a story. You know who they are: our friends, Biff and Mable, the couple who represent the best and worst of us. They make an excellent case study to help us understand authentic change in a person’s life.