From Haruki Murakami's Underground

"Haven't you offered up some part of your Self to someone (or something), and taken on a 'narrative' in return? Haven't we entrusted some part of our personality to some greater System or Order? And if so, has not that System at some stage demanded of us some kind of 'insanity'? Is the narrative you now possess really and truly your own? Are your dreams really your own dreams? Might not they be someone else's visions that could sooner or later turn into nightmares?"

This idea has been on my mind for sometime, although my interest isn't that the dream turns into a nightmare, but that the content of the dream and the nightmare is exactly the same. Or perhaps it is that the fantasy and the nightmare are exactly the same. But I'm also intrigued that in Murakami this shows up in such close proximity to insanity, or to a madness built upon the excesses of any system or narrative.