5 For this is a peculiarity of the pre-eminence of God, not to stand in need of other instruments for the creation of those things which are summoned into existence. His own Word is both suitable and sufficient for the formation of all things, even as John, the disciple of the Lord, declares regarding Him: “All things were made by Him, and without Him was nothing made.” Now, among the “all things” our world must be embraced. It too, therefore, was made by His Word, as Scripture tells us in the book of Genesis that He made all things connected with our world by His Word. David also expresses the same truth [when he says] “For He spoke, and they were made; He commanded, and they were created.” Whom, therefore, shall we believe as to the creation of the world— these heretics who have been mentioned that prate so foolishly and inconsistently on the subject, or the disciples of the Lord, and Moses, who was both a faithful servant of God and a prophet? He at first narrated the formation of the world in these words: “In the beginning God created the heaven and the earth,” and all other things in succession; but neither gods nor angels [had any share in the work].
Now, that this God is the Father of our Lord Jesus Christ, Paul the apostle also has declared, [saying,] “There is one God, the Father, who is above all, and through all things, and in us all.” I have indeed proved already that there is only one God; but I shall further demonstrate this from the apostles themselves, and from the discourses of the Lord. For what sort of conduct would it be, were we to forsake the utterances of the prophets, of the Lord, and of the apostles, that we might give heed to these persons, who speak not a word of sense?
Source: Adversus haereses (New Advent)