12 In the fourth and last book of his work the following passages deserve the church's condemnation. “It may be that as, when men die in this world by the separation of soul and body, they are allotted different positions in hell according to the difference in their works; so when angels die, out of the system of the heavenly Jerusalem, they come down to this world as a hell and are placed on earth according to their deserts.” And again: “as we have compared the souls which pass from this world to hell with those which as they come from heaven to us are in a manner dead; so we must carefully inquire whether this is true of all souls without exception.
For in that case souls born on earth when they desire better things rise out of hell and assume human bodies or when they desire worse things come down to us from better worlds; and in the firmament above us likewise there are souls on their way from our world to higher ones, and others who, while they have fallen from heaven, have not sinned so grievously as to be thrust down to earth.” He thus tries to prove that the firmament, that is the sky, is hell compared with heaven; and that this earth is hell compared with the firmament; and again that our world is heaven to hell.
Or in other words what is hell to some is heaven to others. And not content with saying this he goes on: “at the end of all things when we shall return to the heavenly Jerusalem the hostile powers shall declare war against the people of God to breathe and exercise their valour and strengthen their resolve. For this they cannot have until they have faced and foiled their foes; of whom we read in the book of Numbers that they are overcome by reason, discipline, and tactical skill.”
Source: Letters (New Advent)