Concerning the Nature of Good, Against the Manichaeans

Because therefore God made all things which He did not beget of Himself, not of those things that already existed, but of those things that did not exist at all, that is, of nothing," the Apostle Paul says: "Who calls the things that are not as if they are." But still more plainly it is written in the book of Maccabees: "I pray you, son, look at the heaven and the earth and all the things that are in them; see and know that it was not these of which the Lord God made us." And from this that is written in the Psalm: "He spoke, and they were made." It is manifest, that not of Himself He begot these things, but that He made them by word and command. But what is not of Himself is assuredly of nothing. For there was not anything of which he should make them, concerning which the apostle says most openly: "For from Him, and through Him, and in Him are all things."