15 Let us pass on to the second point. Here, as though there were nothing for his consideration, he vapours, and vents himself unconcernedly, pretending to be asleep, so that he may lull his readers also into slumber. But we were speaking of the other matters pertaining to the faith, that is to say, that all things visible and invisible, the heavenly powers and terrestrial creatures have one and the same creator, even God, that is, the Holy Trinity, as the blessed David says, 'By the word of the Lord were the heavens established, and all the host of them by the breath of His mouth'; and the creation of man is a simple proof of the same; for it was God Himself who took slime from the earth, and through the grace of His own inspiration bestowed on it a reasonable soul, and one endowed with free will; not a part of His own nature (as some impiously teach), but His own workmanship.
And concerning the holy angels, the belief of Christians similarly follows Holy Scripture, which says of God, “Who makes His angels spirits, and His ministers a flaming fire.” Holy Scripture does not allow us to believe that their nature is unchangeable, for it says, “And angels which kept not their own principality, but left their proper habitation, He has kept in everlasting bonds under darkness unto the judgment of the great day”; we know, therefore, that they have changed, and having lost their own dignity and glory have become more like demons. But that the souls of men are caused by the fall of the angels, or by their conversion, we never believed, nor have we so taught (God forbid!), and we confess that the view is at variance with the teaching of the Church.
Source: To Pammachius Against John of Jerusalem (New Advent)