It's a corollary of the question of moral realism. "What is my purpose?" is another way of asking "what should I do?" or "what kind of person is it good for me

It's a corollary of the question of moral realism. "What is my purpose?" is another way of asking "what should I do?" or "what kind of person is it good for me to be?" Under naturalism, you run straight into the impassable barrier of the is-ought problem. With God, we can consider the possibility that he has goals for us. OK, there could be alternatives in between theism and naturalism, but they make even less sense to me and I don't know anyone who takes them seriously.