Thus we are led to regard the two systems as completely intermingled, a fact which adds considerably to the difficulty of explaining the phenomena otherwise than as produced by two great systems - universes they have been called - which have come together, perhaps, by their mutual attraction, and are passing through one another.
Similarly, James is willing to believe in many universes nebeneinander or durcheinander but not (ineinander.
But why must universes be so bad?
The universe exists - or, as otherwise stated, the universe is " contingent " - therefore, even without detailed knowledge of different universes, we can affirm that it must be caused, and in its " Great First Cause " we recognize God.'
How would you define universes? Add your definition here.