The world as we know it?

The world is so big yet so small, or is it so small yet so big? Maybe we are living in a Matrix and deja vu is just a glitch in the system. Or maybe the dreams we have are us seeing things that have happened to our doppelgangers in multiple alternate universal dimensions that are easily accessible with the use of a blue police box (Doctor Who reference). Or is all of this just the rantings of a craaaazy person. The world may never know.