The Enchiridion by St. Augustine
Chapter 38.--Jesus Christ, According to the Flesh, Was Not Born of the Holy Spirit in Such a Sense that the Holy Spirit is His Father.
Nevertheless, are we on this account to say that the Holy Ghost is the father of the man Christ, and that as God the Father begat the Word, so God the Holy Spirit begat the man, and that these two natures constitute the one Christ; and that as the Word He is the Son of God the Father, and as man the Son of God the Holy Spirit, because the Holy Spirit as His father begat Him of the Virgin Mary? Who will dare to say so? Nor is it necessary to show by reasoning how many other absurdities flow from this supposition, when it is itself so absurd that no believer's ears can bear to hear it. Hence, as we confess, |Our Lord Jesus Christ, who of God is God, and as man was born of the Holy Ghost and of the Virgin Mary, having both natures, the divine and the human, is the only Son of God the Father Almighty, from whom proceedeth the Holy Spirit.| Now in what sense do we say that Christ was born of the Holy Spirit, if the Holy Spirit did not beget Him? Is it that He made Him, since our Lord Jesus Christ, though as God |all things were made by Him,| yet as man was Himself made; as the apostle says, |who was made of the seed of David according to the flesh?| But as that created thing which the Virgin conceived and brought forth though it was united only to the person of the Son, was made by the whole Trinity (for the works of the Trinity are not separable), why should the Holy Spirit alone be mentioned as having made it? Or is it that, when one of the Three is mentioned as the author of any work, the whole Trinity is to be understood as working? That is true, and can be proved by examples. But we need not dwell longer on this solution. For the puzzle is, in what sense it is said, |born of the Holy Ghost,| when He is in no sense the Son of the Holy Ghost? For though God made this world, it would not be right to say that it is the Son of God, or that it was born of God; we would say that it was created, or made, or framed, or ordered by Him, or whatever form of expression we can properly use. Here, then, when we make confession that Christ was born of the Holy Ghost and of the Virgin Mary, it is difficult to explain how it is that He is not the Son of the Holy Ghost and is the Son of the Virgin Mary, when He was born both of Him and of her. It is clear beyond a doubt that He was not born of the Holy Spirit as His father, in the same sense that He was born of the Virgin as His mother.