Sean Carroll in Preposterous Universe:
It’s hard to make decisions that will change your life. It’s even harder to make a decision if you know that the outcome could change who you are. Our preferences are determined by who we are, and they might be quite different after a decision is made — and there’s no rational way of taking that into account. Philosopher L.A. Paul has been investigating these transformative experiences — from getting married, to having a child, to going to graduate school — with an eye to deciding how to live in the face of such choices. Of course we can ask people who have made such a choice what they think, but that doesn’t tell us whether the choice is a good one from the standpoint of our current selves, those who haven’t taken the plunge. We talk about what this philosophical conundrum means for real-world decisions, attitudes towards religious faith, and the tricky issue of what it means to be authentic to yourself when your “self” keeps changing over time.