I will therefore set forth the system of the world, that it may easily be understood both when and how it was made by God; which Plato, who discoursed about the making of the world, could neither know nor explain, inasmuch as he was ignorant of the heavenly mystery, which is not learned except by the teaching of prophets and God; and therefore he said that it was created for eternity. Whereas the case is far different, since whatever is of a solid and heavy body, as it received a beginning at some time, so it must needs have an end. For Aristotle, when he did not see how so great a magnitude of things could perish, and wished to escape this objection, said that the world always had existed, and always would exist. He did not at all see, that whatever material thing exists must at some time have had a beginning, and that nothing can exist at all unless it had a beginning. For when we see that earth, and water, and fire perish, are consumed, and extinguished, which are clearly parts of the world, it is understood that that is altogether mortal the members of which are mortal. Thus it comes to pass, that whatever is liable to destruction must have been produced. But everything which comes within the sight of the eyes must of necessity be material, and capable of dissolution. Therefore Epicurus alone, following the authority of Democritus, spoke truly in this matter, who said that it had a beginning at some time, and that it would at some time perish. Nor, however, was he able to assign any reason, either through what causes or at what time this work of such magnitude should be destroyed. But since God has revealed this to us, and we do not arrive at it by conjectures, but by instruction from heaven, we will carefully teach it, that it may at length be evident to those who are desirous of the truth, that the philosophers did not see nor comprehend the truth; but that they had so slight a knowledge of it, that they by no means perceived from what source that fragrance of wisdom, which was so pleasant and agreeable, breathed upon them.