From Nothing, Everything

The idea of the international as an actual or potential world of all worlds arises out of an illusory identification of totality and infinity. Since every world is a world of worlds, the international world may of course contain an infinite multiplicity of worlds, but the only thing that this or any other world cannot contain is everything (OWP, pp. 20-21). [...]in a world that contains a multitude, all of which may find themselves to be a subject at any given moment depending upon the situation in time and space and perspective, we finally gain a vision of the infinite worlds within every world that occupies the World.