He may have realized that he made mistakes and he needs to reconcile himself to the facts that he knows. He may not be proud of everything that has happened in his personal life. He remains a public figure. He has to balance the self he knows with the person the world knows. It's probably fair to say this divorce has put him through some soul-searching, and the elusive inner peace that sustains everyone is high on his preferred menu items.
His best woman now will bring out the best in him for whatever reason. There are few saints in this world. Everyone makes mistakes. You must choose the best relationships. Part of evaluating the quality of a relationship is understanding how you interact with someone; if there are elements of joy, understanding, and peace to balance the passion. Also, when you look forward to having conversations with someone that are generally easy and highly enjoyable as a matter of course, that is a sign of a quality relationship.