164. Now because these two worlds are so distinct, it is necessary that there be two suns, one from which everything spiritual originates, and the other from which everything natural originates. And because everything spiritual from its origin is alive, and everything natural from its origin is lifeless, and their origins are the suns, it follows that the one sun is alive and that the other sun is lifeless, and that the lifeless sun was itself created by the Lord by means of the alive sun.