The world bore no resemblance to itself. That is the resemblance taken to be the world bore no resemblance to anything but itself, while the world proceeded very much as itself, unresembled. So what did those inhabiting the resemblance think they inhabited? They imagined they inhabited a world that was not a resemblance of the world but the world itself, but as said this resemblance was merely a resemblance that resembled nothing but itself.
So what did the world itself resemble? It didn't resemble anything but itself, which is to say it didn't resemble itself, for to resemble itself it would have had to be distinct from itself which it wasn't.