In Victor Hugo's novel Les Miserables, Jean Valjean, a good man, was transformed into a bitter, resentful, and unforgiving man as a result of a massive injustice. But after being the recipient of forgiveness, Valjean was again transformed into a thoroughly forgiving person. For the rest of his life, he was an exemplar of forgiveness. Do such changes only happen in fiction? Or is it possible for people to change unforgiving personalities into more forgiving personalities?