Your first book was an examination of original sin — not, for most people, a topic connected with joy. But the title of the book is The Joy of Being Wrong. What joy is associated with original sin?
It’s the joy of not having to get things right. The doctrine means that we are all in a mess, no one more or less than anyone else, and we can trust the One who is getting us out of the mess, who starts from where we are. If it were not for the doctrine of original sin, which follows from the resurrection — just as a parting glance at who we used to be follows from seeing ourselves as we are coming to be — we would be left with a religion requiring us to “get it right,” and that is no joy at all.