There is an idea of free will associated with it too. In order for there to be being, there has to be limitation. In order for there to be good, there has to be the possibility of evil. I think the right path is to exist such that the possibility of evil remains open, but that you choose the good. And I don't think that evil perse is built into the structure of the world. But I do think that it's human. I think that evil is human. And I think it's understandable. There is a difference between evil and tragedy. Tragedy does seem to be built into the structure of the world. But human beings seem to be equipped to deal with tragedy, but we are not equipped to deal with malevolence. That destroys people. I think that, metaphysically thinking, the world is structured such that humans have a choice between good and evil. Why do we have a choice? We don't know.