To Cledonius the Priest Against Apollinarius. (Ep. CI.)
If, however, they rely on the passage, The Word was made Flesh and dwelt among us, and because of this erase the noblest part of Man (as cobblers do the thicker part of skins) that they may join together God and Flesh, it is time for them to say that God is God only of flesh, and not of souls, because it is written, “As You have given Him power over all Flesh,” and “Unto You shall all Flesh come;” and “Let all Flesh bless His holy Name,” meaning every Man. Or, again, they must suppose that our fathers went down into Egypt without bodies and invisible, and that only the Soul of Joseph was imprisoned by Pharaoh, because it is written, “They went down into Egypt with threescore and fifteen Souls,” and “The iron entered into his Soul,” a thing which could not be bound. They who argue thus do not know that such expressions are used by Synecdoche, declaring the whole by the part, as when Scripture says that the young ravens call upon God, to indicate the whole feathered race; or Pleiades, Hesperus, and Arcturus are mentioned, instead of all the Stars and His Providence over them.
Moreover, in no other way was it possible for the Love of God toward us to be manifested than by making mention of our flesh, and that for our sake He descended even to our lower part. For that flesh is less precious than soul, everyone who has a spark of sense will acknowledge. And so the passage, The Word was made Flesh, seems to me to be equivalent to that in which it is said that He was made sin, or a curse for us; not that the Lord was transformed into either of these, how could He be? But because by taking them upon Him He took away our sins and bore our iniquities. This, then, is sufficient to say at the present time for the sake of clearness and of being understood by the many. And I write it, not with any desire to compose a treatise, but only to check the progress of deceit; and if it is thought well, I will give a fuller account of these matters at greater length.
But there is a matter which is graver than these, a special point which it is necessary that I should not pass over. I would they were even cut off that trouble you, and would reintroduce a second Judaism, and a second circumcision, and a second system of sacrifices. For if this be done, what hinders Christ also being born again to set them aside, and again being betrayed by Judas, and crucified and buried, and rising again, that all may be fulfilled in the same order, like the Greek system of cycles, in which the same revolutions of the stars bring round the same events? For what the method of selection is, in accordance with which some of the events are to occur and others to be omitted, let these wise men who glory in the multitude of their books show us.
But since, puffed up by their theory of the Trinity, they falsely accuse us of being unsound in the Faith and entice the multitude, it is necessary that people should know that Apollinarius, while granting the Name of Godhead to the Holy Ghost, did not preserve the Power of the Godhead. For to make the Trinity consist of Great, Greater, and Greatest, as of Light, Ray, and Sun, the Spirit and the Son and the Father (as is clearly stated in his writings), is a ladder of Godhead not leading to Heaven, but down from Heaven. But we recognize God the Father and the Son and the Holy Ghost, and these not as bare titles, dividing inequalities of ranks or of power, but as there is one and the same title, so there is one nature and one substance in the Godhead.
But if anyone who thinks we have spoken rightly on this subject reproaches us with holding communion with heretics, let him prove that we are open to this charge, and we will either convince him or retire. But it is not safe to make any innovation before judgment is given, especially in a matter of such importance, and connected with so great issues. We have protested and continue to protest this before God and men. And not even now, be well assured, should we have written this, if we had not seen that the Church was being torn asunder and divided, among their other tricks, by their present synagogue of vanity. But if anyone when we say and protest this, either from some advantage they will thus gain, or through fear of men, or monstrous littleness of mind, or through some neglect of pastors and governors, or through love of novelty and proneness to innovations, rejects us as unworthy of credit, and attaches himself to such men, and divides the noble body of the Church, he shall bear his judgment, whoever he may be, and shall give account to God in the day of judgment. But if their long books, and their new Psalters, contrary to that of David, and the grace of their metres, are taken for a third Testament, we too will compose Psalms, and will write much in metre. For we also think we have the spirit of God, if indeed this is a gift of the Spirit, and not a human novelty. This I will that thou declare publicly, that we may not be held responsible, as overlooking such an evil, and as though this wicked doctrine received food and strength from our indifference.
Source: Letters (New Advent)