I agree on the cult thing; only this one really works. You can actually become one with your "god", see the inside of the speed force. Feel it. So it's like a wacky cult - that's actually true.

It would be interesting to see someone trying to explain it to an outsider; it would be like explaining religion to an atheist, or a multiorgasm to someone who never had an orgasm at all. Pardon the.. choice of examples.