Ah, yes. Worlds within worlds. Dreams within dreams. When having a dream, most people believe it is real until they wake up. That's exactly what waking life is like for most people too...only it's of considerably longer duration. When they wake up from it, then they realize it was just a dream after all. You can even die in a dream...but then you wake up and find out you're not dead. :-) I know, I have.