Perhaps God (the trinity) has MPD? Perhaps since Atman=Brahman, Hinduism also proclaims an MPD God? I have often thought that "untouchables" are God slumming* it!
Every night we experience MPD! We are actor,screen writer and landscape designer in our dreams and each is unaware of the other. For example, a monster might jump out of a bush (written by the screen writer) and totally suprise the actor.
Of course everyday we become different people. At work I have a different personality (more inhibited, less emotional, more professional ) than at home.
* Slumming it is when a wealthy person takes a vacation in (for example) a ghetto, to experience something shockingly different