On the contrary the Holy Spirit is, to begin with, because of qualities that are essentially holy, that which the Father, essentially Holy, is; and such as the Only-begotten is, such is the Holy Spirit; then, again, He is so by virtue of life-giving, of imperishability, of unvariableness, of everlastingness, of justice, of wisdom, of rectitude, of sovereignty, of goodness, of power, of capacity to give all good things, and above them all life itself, and by being everywhere, being present in each, filling the earth, residing in the heavens, shed abroad upon supernatural Powers, filling all things according to the deserts of each, Himself remaining full, being with all who are worthy, and yet not parted from the Holy Trinity. He ever “searches the deep things of God,” ever “receives” from the Son, ever is being “sent,” and yet not separated, and being “glorified,” and yet He has always had glory. It is plain, indeed, that one who gives glory to another must be found himself in the possession of superabundant glory; for how could one devoid of glory glorify another? Unless a thing be itself light, how can it display the gracious gift of light? So the power to glorify could never be displayed by one who was not himself glory47    It is worth noticing that Gregory maintains (Hom. xv. on Canticles) that Δόξα in Scripture means the Holy Ghost., and honour, and majesty, and greatness. Now the Spirit does glorify the Father and the Son. Neither does He lie Who saith, “Them that glorify Me I glorify”48    Cf. 1 Sam. ii. 30.; and “I have glorified Thee49    S. John xvii. 4,” is said by our Lord to the Father; and again He says, “Glorify Thou Me with the glory which I had with Thee before the world was50    S. John xvii. 5.” The Divine Voice answers, “I have both glorified, and will glorify again51    S. John xii. 28.” You see the revolving circle of the glory moving from Like to Like. The Son is glorified by the Spirit; the Father is glorified by the Son; again the Son has His glory from the Father; and the Only-begotten thus becomes the glory of the Spirit. For with what shall the Father be glorified, but with the true glory of the Son: and with what again shall the Son be glorified, but with the majesty of the Spirit? In like manner, again, Faith completes the circle, and glorifies the Son by means of the Spirit, and the Father by means of the Son.

Τὸ δὲ πνεῦμα τὸ ἅγιον πρῶτον μὲν ἀπὸ τῶν κατὰ φύσιν ἁγίων ἐκεῖνό ἐστιν ὅπερ ὁ πατήρ, κατὰ φύσιν ἅγιος, καὶ ὁ μονογενὴς ὡσαύτως. οὕτω καὶ τὸ πνεῦμα τὸ ἅγιον. καὶ κατὰ τὸ ζωοποιὸν πάλιν καὶ κατὰ τὸ ἄφθαρτόν τε καὶ ἀναλλοίωτον καὶ ἀΐδιον, δίκαιον, σοφόν, εὐθές, ἡγεμονικόν, ἀγαθόν, δυνατόν, ἀγαθῶν πάντων παρεκτικὸν καὶ πρό γε ἁπάντων αὐτῆς τῆς ζωῆς: πανταχοῦ ὂν καὶ ἑκάστῳ παρὸν καὶ τὴν γῆν πληροῦν καὶ ἐν οὐρανοῖς μένον, ἐν ταῖς ὑπερκοσμίοις δυνάμεσιν ἐκχεόμενον, πάντα πληροῦν κατὰ τὴν ἀξίαν ἑκάστου καὶ αὐτὸ πλῆρες μένον, μετὰ πάντων ὂν τῶν ἀξίων, καὶ τῆς ἁγίας τριάδος οὐ χωριζόμενον: ἀεὶ τὰ βάθη τοῦ θεοῦ ἐρευνᾷ, ἀεὶ ἐκ τοῦ υἱοῦ λαμβάνει καὶ ἀποστέλλεται καὶ οὐ χωρίζεται καὶ δοξάζεται καὶ δόξαν ἔχει: ὃ γὰρ ἄλλῳ δόξαν δίδωσιν, δῆλον ὅτι ἐν ὑπερβαλλούσῃ δόξῃ καταλαμβάνεται. πῶς γὰρ δοξάζει τὸ δόξης ἄμοιρον; ἐὰν μή τι φῶς ᾖ, πῶς τὴν τοῦ φωτὸς ἐπιδείξεται χάριν; οὕτως οὐδὲ τὴν δοξαστικὴν δύναμιν ἐπιδείξεται, ὃ ἂν μὴ αὐτὸ ᾖ δόξα καὶ τιμὴ καὶ μεγαλωσύνη καὶ μεγαλοπρέπεια. δοξάζει οὖν τὸν πατέρα καὶ τὸν υἱὸν τὸ πνεῦμα. ἀλλ' ὁ εἰπὼν ἀψευδής ἐστι Τοὺς δοξάζοντάς με δοξάζω: Ἐγώ σε ἐδόξασα, φησὶ πρὸς τὸν πατέρα ὁ κύριος: καὶ πάλιν Δόξασόν με τῇ δόξῃ ᾗ εἶχον ἀπ' ἀρχῆς παρὰ σοὶ πρὸ τοῦ τὸν κόσμον εἶναι. ἀποκρίνεται ἡ θεία φωνή: Καὶ ἐδόξασα καὶ πάλιν δοξάσω. ὁρᾷς τὴν ἐγκύκλιον τῆς δόξης διὰ τῶν ὁμοίων περιφοράν; δοξάζεται ὁ υἱὸς ὑπὸ τοῦ πνεύματος: δοξάζεται ὑπὸ τοῦ υἱοῦ ὁ πατήρ: πάλιν τὴν δόξαν ἔχει παρὰ τοῦ πατρὸς ὁ υἱὸς καὶ δόξα τοῦ πνεύματος ὁ μονογενὴς γίνεται: τίνι γὰρ ἐνδοξασθήσεται ὁ πατήρ, εἰ μὴ τῇ ἀληθινῇ τοῦ μονογενοῦς δόξῃ; ἐν τίνι δὲ πάλιν ὁ υἱὸς δοξασθήσεται, εἰ μὴ ἐν τῇ μεγαλωσύνῃ τοῦ πνεύματος; οὕτω πάλιν καὶ ἀνακυκλούμενος ὁ λόγος τὸν υἱὸν μὲν δοξάζει διὰ τοῦ πνεύματος, διὰ δὲ τοῦ υἱοῦ τὸν πατέρα.