Take that idea far enough and you get something like Haibane Renmei, where there is no official interpretation -- everybody has to generate their own idea of what the show's premise is. This was frustrating the first time I watched it, since I didn't know that there wasn't going to be an explanation for everything. The second time, though, I absolutely loved it.
A monthly thread for posting rationality-related quotes you've seen recently (or had stored in your quotesfile for ages).