X. What then? Is the Spirit God? Most certainly. Well then, is He Consubstantial? Yes, if He is God. Grant me, says my opponent, that there spring from the same Source One who is a Son, and One who is not a Son, and these of One Substance with the Source, and I admit a God and a God. Nay, if you will grant me that there is another God and another nature of God I will give you the same Trinity with the same name and facts. But since God is One and the Supreme Nature is One, how can I present to you the Likeness? Or will you seek it again in lower regions and in your own surroundings? It is very shameful, and not only shameful, but very foolish, to take from things below a guess at things above, and from a fluctuating nature at the things that are unchanging, and as Isaiah says, to seek the Living among the dead. But yet I will try, for your sake, to give you some assistance for your argument, even from that source. I think I will pass over other points, though I might bring forward many from animal history, some generally known, others only known to a few, of what nature has contrived with wonderful art in connection with the generation of animals. For not only are likes said to beget likes, and things diverse to beget things diverse, but also likes to be begotten by things diverse, and things diverse by likes. And if we may believe the story, there is yet another mode of generation, when an animal is self-consumed and self-begotten. There are also creatures which depart in some sort from their true natures, and undergo change and transformation from one creature into another, by a magnificence of nature. And indeed sometimes in the same species part may be generated and part not; and yet all of one substance; which is more like our present subject. I will just mention one fact of our own nature which every one knows, and then I will pass on to another part of the subject.
XI. What was Adam? A creature of God. What then was Eve? A fragment of the creature. And what was Seth? The begotten of both. Does it then seem to you that Creature and Fragment and Begotten are the same thing? Of course it does not. But were not these persons consubstantial? Of course they were. Well then, here it is an acknowledged fact that different persons may have the same substance. I say this, not that I would attribute creation or fraction or any property of body to the Godhead (let none of your contenders for a word be down upon me again), but that I may contemplate in these, as on a stage, things which are objects of thought alone. For it is not possible to trace out any image exactly to the whole extent of the truth. But, they say, what is the meaning of all this? For is not the one an offspring, and the other a something else of the One? Did not both Eve and Seth come from the one Adam? And were they both begotten by him? No; but the one was a fragment of him, and the other was begotten by him. And yet the two were one and the same thing; both were human beings; no one will deny that. Will you then give up your contention against the Spirit, that He must be either altogether begotten, or else cannot be consubstantial, or be God; and admit from human examples the possibility of our position? I think it will be well for you, unless you are determined to be very quarrelsome, and to fight against what is proved to demonstration.
XII. But, he says, who in ancient or modern times ever worshipped the Spirit? Who ever prayed to Him? Where is it written that we ought to worship Him, or to pray to Him, and whence have you derived this tenet of yours? We will give the more perfect reason hereafter, when we discuss the question of the unwritten; for the present it will suffice to say that it is the Spirit in Whom we worship, and in Whom we pray. For Scripture says, God is a Spirit, and they that worship Him must worship Him in Spirit and in truth. And again,—We know not what we should pray for as we ought; but the Spirit Itself makes intercession for us with groanings which cannot be uttered; and I will pray with the Spirit and I will pray with the understanding also; —that is, in the mind and in the Spirit. Therefore to adore or to pray to the Spirit seems to me to be simply Himself offering prayer or adoration to Himself. And what godly or learned man would disapprove of this, because in fact the adoration of One is the adoration of the Three, because of the equality of honour and Deity between the Three? So I will not be frightened by the argument that all things are said to have been made by the Son; as if the Holy Spirit also were one of these things. For it says all things that were made, and not simply all things. For the Father was not, nor were any of the things that were not made. Prove that He was made, and then give Him to the Son, and number Him among the creatures; but until you can prove this you will gain nothing for your impiety from this comprehensive phrase. For if He was made, it was certainly through Christ; I myself would not deny that. But if He was not made, how can He be either one of the All, or through Christ? Cease then to dishonour the Father in your opposition to the Only-begotten (for it is no real honour, by presenting to Him a creature to rob Him of what is more valuable, a Son), and to dishonour the Son in your opposition to the Spirit. For He is not the Maker of a Fellow servant, but He is glorified with One of co-equal honour. Rank no part of the Trinity with yourself, lest thou fall away from the Trinity; cut not off from Either the One and equally august Nature; because if you overthrow any of the Three you will have overthrown the whole. Better to take a meagre view of the Unity than to venture on a complete impiety.
XIII. Our argument has now come to its principal point; and I am grieved that a problem that was long dead, and that had given way to faith, is now stirred up afresh; yet it is necessary to stand against these praters, and not to let judgment go by default, when we have the Word on our side, and are pleading the cause of the Spirit. If, say they, there is God and God and God, how is it that there are not Three Gods, or how is it that what is glorified is not a plurality of Principles? Who is it who say this? Those who have reached a more complete ungodliness, or even those who have taken the secondary part; I mean who are moderate in a sense in respect of the Son. For my argument is partly against both in common, partly against these latter in particular. What I have to say in answer to these is as follows:—What right have you who worship the Son, even though you have revolted from the Spirit, to call us Tritheists? Are not you Ditheists? For if you deny also the worship of the Only Begotten, you have clearly ranged yourself among our adversaries. And why should we deal kindly with you as not quite dead? But if you do worship Him, and are so far in the way of salvation, we will ask you what reasons you have to give for your ditheism, if you are charged with it? If there is in you a word of wisdom answer, and open to us also a way to an answer. For the very same reason with which you will repel a charge of Ditheism will prove sufficient for us against one of Tritheism. And thus we shall win the day by making use of you our accusers as our Advocates, than which nothing can be more generous.
Source: Orations (New Advent)