On the World
1 Although all the discussions in the preceding book have had reference to the world and its arrangements, it now seems to follow that we should specially re-discuss a few points respecting the world itself, i.e., its beginning and end, or those dispensations of Divine Providence which have taken place between the beginning and the end, or those events which are supposed to have occurred before the creation of the world, or are to take place after the end.
In this investigation, the first point which clearly appears is, that the world in all its diversified and varying conditions is composed not only of rational and diviner natures, and of a diversity of bodies, but of dumb animals, wild and tame beasts, of birds, and of all things which live in the waters; then, secondly, of places, i.e., of the heaven or heavens, and of the earth or water, as well as of the air, which is intermediate, and which they term æther, and of everything which proceeds from the earth or is born in it. Seeing, then, there is so great a variety in the world, and so great a diversity among rational beings themselves, on account of which every other variety and diversity also is supposed to have come into existence, what other cause than this ought to be assigned for the existence of the world, especially if we have regard to that end by means of which it was shown in the preceding book that all things are to be restored to their original condition? And if this should seem to be logically stated, what other cause, as we have already said, are we to imagine for so great a diversity in the world, save the diversity and variety in the movements and declensions of those who fell from that primeval unity and harmony in which they were at first created by God, and who, being driven from that state of goodness, and drawn in various directions by the harassing influence of different motives and desires, have changed, according to their different tendencies, the single and undivided goodness of their nature into minds of various sorts?
2. But God, by the ineffable skill of His wisdom, transforming and restoring all things, in whatever manner they are made, to some useful aim, and to the common advantage of all, recalls those very creatures which differed so much from each other in mental conformation to one agreement of labour and purpose; so that, although they are under the influence of different motives, they nevertheless complete the fullness and perfection of one world, and the very variety of minds tends to one end of perfection. For it is one power which grasps and holds together all the diversity of the world, and leads the different movements towards one work, lest so immense an undertaking as that of the world should be dissolved by the dissensions of souls. And for this reason we think that God, the Father of all things, in order to ensure the salvation of all His creatures through the ineffable plan of His word and wisdom, so arranged each of these, that every spirit, whether soul or rational existence, however called, should not be compelled by force, against the liberty of his own will, to any other course than that to which the motives of his own mind led him (lest by so doing the power of exercising free-will should seem to be taken away, which certainly would produce a change in the nature of the being itself); and that the varying purposes of these would be suitably and usefully adapted to the harmony of one world, by some of them requiring help, and others being able to give it, and others again being the cause of struggle and contest to those who are making progress, among whom their diligence would be deemed more worthy of approval, and the place of rank obtained after victory be held with greater certainty, which should be established by the difficulties of the contest.
3. Although the whole world is arranged into offices of different kinds, its condition, nevertheless, is not to be supposed as one of internal discrepancies and discordances; but as our one body is provided with many members, and is held together by one soul, so I am of opinion that the whole world also ought to be regarded as some huge and immense animal, which is kept together by the power and reason of God as by one soul. This also, I think, is indicated in sacred Scripture by the declaration of the prophet, “Do not I fill heaven and earth? Says the Lord;” and again, “The heaven is My throne, and the earth is My footstool;” and by the Saviour's words, when He says that we are to swear “neither by heaven, for it is God's throne; nor by the earth, for it is His footstool.” To the same effect also are the words of Paul, in his address to the Athenians, when he says, “In Him we live, and move, and have our being.” For how do we live, and move, and have our being in God, except by His comprehending and holding together the whole world by His power? And how is heaven the throne of God, and the earth His footstool, as the Saviour Himself declares, save by His power filling all things both in heaven and earth, according to the Lord's own words? And that God, the Father of all things, fills and holds together the world with the fullness of His power, according to those passages which we have quoted, no one, I think, will have any difficulty in admitting. And now, since the course of the preceding discussion has shown that the different movements of rational beings, and their varying opinions, have brought about the diversity that is in the world, we must see whether it may not be appropriate that this world should have a termination like its beginning. For there is no doubt that its end must be sought amid much diversity and variety; which variety, being found to exist in the termination of the world, will again furnish ground and occasion for the diversities of the other world which is to succeed the present.
Source: De Principiis (New Advent)