Selfishness and generosity are not relegated to particular life choices, and if generosity is a worthy life goal—and I believe it is—perhaps our task is to choose the path that for us creates its best opportunity. It is quite possible that I would be a less generous teacher, a less supportive partner, a less available friend if I had children of my own to take care of. Love is not a pie, the saying goes, but it is also true that there are only so many hours in a day.

