"There is a religious view I find interesting, which is pandeism: the view that God used to exist, and be the only thing that existed, and then transformed himself into the universe, and so no longer exists. The reason God did this was basically for fun, or to see what happened. And maybe at some point the universe will transform itself back into God—that would be like nirvana or heaven. But then eventually God would get bored again and start the cycle over. As I understand it, this is close to some parts of Hindu cosmology."