“At your age, life is full of possibilities. But as the years pass, those possibilities vanish, one by one, like doors closing in a hallway. You feel time slip by, and your energy slip away. One day, you realize you’re too old to be a famous musician, or change careers, or have more children. And each of those closed doors represents a regret. As you get older, well, those regrets come to define you. Perhaps the lack of a family life was Arthur’s regret.