On the Holy Trinity, and of the Godhead of the Holy Spirit (To Eustathius)

But the order of things which is above us, alike in the region of intelligence and in that of sense (if by what we know we may form conjectures about those things also which are above us), is itself established within the operation and power of the Holy Spirit, every man receiving the benefit according to his own desert and need. For although the arrangement and ordering of things above our nature is obscure to our sense, yet one may more reasonably infer, by the things which we know, that in them too the power of the Spirit works, than that it is banished from the order existing in the things above us. For he who asserts the latter view advances his blasphemy in a naked and unseemly shape, without being able to support his absurd opinion by any argument. But he who agrees that those things which are above us are also ordered by the power of the Spirit with the Father and the Son, makes his assertion on this point with the support of clear evidence from his own life. For as the nature of man is compounded of body and soul, and the angelic nature has for its portion life without a body, if the Holy Spirit worked only in the case of bodies, and the soul were not capable of receiving the grace that comes from Him, one might perhaps infer from this, if the intellectual and incorporeal nature which is in us were above the power of the Spirit, that the angelic life too was in no need of His grace. But if the gift of the Holy Spirit is principally a grace of the soul, and the constitution of the soul is linked by its intellectuality and invisibility to the angelic life, what person who knows how to see a consequence would not agree, that every intellectual nature is governed by the ordering of the Holy Spirit? For since it is said “the angels do always behold the Face of My Father which is in heaven,” and it is not possible to behold the person of the Father otherwise than by fixing the sight upon it through His image; and the image of the person of the Father is the Only-begotten, and to Him again no man can draw near whose mind has not been illumined by the Holy Spirit, what else is shown from this but that the Holy Spirit is not separated from any operation which is wrought by the Father and the Son? Thus the identity of operation in Father, Son, and Holy Spirit shows plainly the undistinguishable character of their substance. So that even if the name of Godhead does indicate nature, the community of substance shows that this appellation is properly applied also to the Holy Spirit. But I know not how these makers-up of all sorts of arguments bring the appellation of Godhead to be an indication of nature, as though they had not heard from the Scripture that it is a matter of appointment, in which way nature does not arise. For Moses was appointed as a god of the Egyptians, since He Who gave him the oracles, etc., spoke thus to him, “I have given you as a god to Pharaoh.” Thus the force of the appellation is the indication of some power, either of oversight or of operation. But the Divine nature itself, as it is, remains unexpressed by all the names that are conceived for it, as our doctrine declares. For in learning that He is beneficent, and a judge, good, and just, and all else of the same kind, we learn diversities of His operations, but we are none the more able to learn by our knowledge of His operations the nature of Him Who works. For when one gives a definition of any one of these attributes, and of the nature to which the names are applied, he will not give the same definition of both: and of things of which the definition is different, the nature also is distinct. Indeed the substance is one thing which no definition has been found to express, and the significance of the names employed concerning it varies, as the names are given from some operation or accident. Now the fact that there is no distinction in the operations we learn from the community of the attributes, but of the difference in respect of nature we find no clear proof, the identity of operations indicating rather, as we said, community of nature. If, then, Godhead is a name derived from operation, as we say that the operation of the Father, and the Son, and the Holy Spirit is one, so we say that the Godhead is one: or if, according to the view of the majority, Godhead is indicative of nature, since we cannot find any diversity in their nature, we not unreasonably define the Holy Trinity to be of one Godhead.

But if any one were to call this appellation indicative of dignity, I cannot tell by what reasoning he drags the word to this significance. Since however one may hear many saying things of this kind, in order that the zeal of its opponents may not find a ground for attacking the truth, we go out of our way with those who take this view, to consider such an opinion, and say that, even if the name does denote dignity, in this case too the appellation will properly befit the Holy Spirit. For the attribute of kingship denotes all dignity; and “our God,” it says, “is King from everlasting.” But the Son, having all things which are the Father's, is Himself proclaimed a King by Holy Scripture. Now the Divine Scripture says that the Holy Spirit is the unction of the Only-Begotten, interpreting the dignity of the Spirit by a transference of the terms commonly used in this world. For as, in ancient days, in those who were advanced to kingship, the token of this dignity was the unction which was applied to them, and when this took place there was thenceforth a change from private and humble estate to the superiority of rule, and he who was deemed worthy of this grace received after his anointing another name, being called, instead of an ordinary man, the Anointed of the Lord: for this reason, that the dignity of the Holy Spirit might be more clearly shown to men, He was called by the Scripture “the sign of the Kingdom,” and “Unction,” whereby we are taught that the Holy Spirit shares in the glory and kingdom of the Only-begotten Son of God. For as in Israel it was not permitted to enter upon the kingdom without the unction being previously given, so the word, by a transference of the terms in use among ourselves, indicates the equality of power, showing that not even the kingdom of the Son is received without the dignity of the Holy Spirit. And for this reason He is properly called Christ, since this name gives the proof of His inseparable and indivisible conjunction with the Holy Spirit. If, then, the Only-begotten God is the Anointed, and the Holy Spirit is His Unction, and the appellation of Anointed points to the Kingly authority, and the anointing is the token of His Kingship, then the Holy Spirit shares also in His dignity. If, therefore, they say that the attribute of Godhead is significative of dignity, and the Holy Spirit is shown to share in this last quality, it follows that He Who partakes in the dignity will also partake in the name which represents it.