[51] therefore it is necessary to say that the world has not been destroyed though its body has been taken away, just as Dion was not destroyed by having his foot cut off, but the soul of the world it is that has perished, like Theon, who suffered no artificial mutilation, for the world also receded to a lesser substance when all of it that resembled a body was taken away. And the soul was destroyed because there could not be two specific differences affecting the same subject. But it is impiety to say that providence perishes, and since it is imperishable it follows of necessity that the world also must be imperishable.