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

What, then, is our doctrine? The Lord, in delivering the saving Faith to those who become disciples of the word, joins with the Father and the Son the Holy Spirit also; and we affirm that the union of that which has once been joined is continual; for it is not joined in one thing, and separated in others. But the power of the Spirit, being included with the Father and the Son in the life-giving power, by which our nature is transferred from the corruptible life to immortality, and in many other cases also, as in the conception of “Good,” and “Holy,” and “Eternal,” “Wise,” “Righteous,” “Chief,” “Mighty,” and in fact everywhere, has an inseparable association with them in all the attributes ascribed in a sense of special excellence. And so we consider that it is right to think that that which is joined to the Father and the Son in such sublime and exalted conceptions is not separated from them in any. For we do not know of any differences by way of superiority and inferiority in attributes which express our conceptions of the Divine nature, so that we should suppose it an act of piety (while allowing to the Spirit community in the inferior attributes) to judge Him unworthy of those more exalted. For all the Divine attributes, whether named or conceived, are of like rank one with another, in that they are not distinguishable in respect of the signification of their subject. For the appellation of “the Good” does not lead our minds to one subject, and that of “the Wise,” or “the Mighty,” or “the Righteous” to another, but the thing to which all the attributes point is one; and, if you speak of God, you signify the same Whom you understood by the other attributes. If then all the attributes ascribed to the Divine nature are of equal force as regards their designation of the subject, leading our minds to the same subject in various aspects, what reason is there that one, while allowing to the Spirit community with the Father and the Son in the other attributes, should exclude Him from the Godhead alone? It is absolutely necessary either to allow to Him community in this also, or not to admit His community in the others. For if He is worthy in the case of those attributes, He is surely not less worthy in this. But if He is “less,” according to their phrase, so that He is excluded from community with the Father and the Son in the attribute of Godhead, neither is He worthy to share in any other of the attributes which belong to God. For the attributes, when rightly understood and mutually compared by that notion which we contemplate in each case, will be found to imply nothing less than the appellation of “God.” And a proof of this is that many even of the inferior existences are called by this very name. Further, the Divine Scripture is not sparing in this use of the name even in the case of things incongruous, as when it names idols by the appellation of God. For it says, “Let the gods that have not made the heavens and the earth perish, and be cast down beneath the earth”; and, “all the gods of the heathen are devils”; and the witch in her incantations, when she brings up for Saul the spirits that he sought for, says that she “saw gods.” And again Balaam, being an augur and a seer, and engaging in divination, and having obtained for himself the instruction of devils and magical augury, is said in Scripture to receive counsel from God. One may show by collecting many instances of the same kind from the Divine Scripture, that this attribute has no supremacy over the other attributes which are proper to God, seeing that, as has been said, we find it predicated, in an equivocal sense, even of things incongruous; but we are nowhere taught in Scripture that the names of “the Holy,” “the Incorruptible,” “the Righteous,” “the Good,” are made common to things unworthy. If, then, they do not deny that the Holy Spirit has community with the Father and the Son in those attributes which, in their sense of special excellence, are piously predicated only of the Divine nature, what reason is there to pretend that He is excluded from community in this only, wherein it was shown that, by an equivocal use, even devils and idols share?

But they say that this appellation is indicative of nature, and that, as the nature of the Spirit is not common to the Father and the Son, for this reason neither does he partake in the community of this attribute. Let them show, then, whereby they discern this diversity of nature. For if it were possible that the Divine nature should be contemplated in its absolute essence, and that we should find by appearances what is and what is not proper to it, we should surely have no need of other arguments or evidence for the comprehension of the question. But since it is exalted above the understanding of the questioners, and we have to argue from some particular evidence about those things which evade our knowledge, it is absolutely necessary for us to be guided to the investigation of the Divine nature by its operations. If, then, we see that the operations which are wrought by the Father and the Son and the Holy Spirit differ one from the other, we shall conjecture from the different character of the operations that the natures which operate are also different. For it cannot be that things which differ in their very nature should agree in the form of their operation: fire does not chill, nor ice give warmth, but their operations are distinguished together with the difference between their natures. If, on the other hand, we understand that the operation of the Father, the Son, and the Holy Spirit is one, differing or varying in nothing, the oneness of their nature must needs be inferred from the identity of their operation. The Father, the Son, and the Holy Spirit alike give sanctification, and life, and light, and comfort, and all similar graces. And let no one attribute the power of sanctification in a special sense to the Spirit, when he hears the Saviour in the Gospel saying to the Father concerning His disciples, “Father, sanctify them in Your name.” So too all the other gifts are wrought in those who are worthy alike by the Father, the Son, and the Holy Spirit: every grace and power, guidance, life, comfort, the change to immortality, the passage to liberty, and every other boon that exists, which descends to us.