6. Assuredly, when he prayed for the Corinthians, he prayed in the Triad, saying: ‘The grace of the Lord Jesus Christ and the love of God and the communion of the Holy Spirit be with you all.’ For inasmuch as we partake of the Spirit, we have the grace of the Word and, in the Word, the love of the Father. And as the grace of the Triad is one, so also the Triad is indivisible. We can see this in regard to Saint Mary herself. The archangel Gabriel, when sent to announce the coming of the Word upon her, said, ‘The Holy Spirit shall come upon thee’, knowing that the Spirit was in the Word. Wherefore he straightway added: ‘and the Power of the Highest shall overshadow thee.’ For Christ is ‘the Power of God and the Wisdom of God’. But if the Spirit was in the Word, then it must be clear that the Spirit through the Word was also in God. Likewise, when the Spirit comes to us, the Son will come and the Father, and they will make their abode in us. For the Triad is indivisible, and its Godhead is one; and there is one God, ‘over all and through all and in all’. This is the faith of the Catholic Church. For the Lord grounded and rooted it in the Triad, when he said to his disciples: ‘Go ye and make disciples of all the nations, baptizing them into the name of the Father and of the Son and of the Holy Spirit.’ Were the Spirit a creature, he would not have ranked him with the Father; lest, by reason of something strange and foreign being ranked therewith, the Triad should not be consistent. For what was lacking to God, that he should take to himself something foreign in essence and share his glory with it? God forbid! It is not so! He himself said: ‘I am full.’ Therefore the Lord ranked the Spirit with the name of the Father, to show that the Triad is not composed of diverse elements, I mean of creator and creature, but its Godhead is one. It was because he had learned this that Paul taught the oneness of the grace given in the Triad, saying: ‘One Lord, one faith, one baptism’. As there is one baptism, so there is one faith. For he who believes in the Father, in the Father knows the Son; and it is not apart from the Son that he knows the Spirit. Therefore he believes also in the Son and in the Holy Spirit. For the Godhead of the Triad is one, as it is made known from one, even from the Father.

Ἀμέλει, ἐπευχόμενος Κορινθίοις, ἐν τῇ Τριά δι ηὔχετο λέγων· «Ἡ χάρις τοῦ Κυρίου Ἰησοῦ Χριστοῦ, καὶ ἡ ἀγάπη τοῦ Θεοῦ, καὶ ἡ κοινωνία τοῦ ἁγίου Πνεύματος, μετὰ πάντων ὑμῶν.» Τοῦ γὰρ Πνεύμα τος μετέχοντες, ἔχομεν τὴν τοῦ Λόγου χάριν, καὶ ἐν αὐτῷ τὴν τοῦ Πατρὸς ἀγάπην. Ὡς δὲ μία τῆς Τριάδος ἡ χάρις, οὕτως ἀδιαίρετος ἡ Τριάς. Τοῦτο δ' ἄν τις ἴδοι καὶ ἐπ' αὐτῆς τῆς ἁγίας Μαρίας. Ὁ γὰρ ἄγγελος Γαβριὴλ, ἀποσταλεὶς ἀπαγγεῖλαι τὴν ἐπ' αὐ τῆς ἐσομένην τοῦ Λόγου κάθοδον, «Πνεῦμα ἅγιον,» εἴρηκεν, «ἐπελεύσεται ἐπὶ σέ,» εἰδὼς, ὅτι ἐν τῷ Λόγῳ ἦν τὸ Πνεῦμα· εὐθὺς γοῦν συνῆψε· «Καὶ δύναμις Ὑψίστου ἐπισκιάσει σοι. Χριστὸς γὰρ Θεοῦ δύναμις καὶ Θεοῦ σοφία.» Τοῦ δὲ Πνεύματος ὄντος ἐν τῷ Λόγῳ, δῆλον ἂν εἴη, ὡς καὶ ἐν τῷ Θεῷ ἦν διὰ τοῦ Λόγου τὸ Πνεῦμα. Οὕτω δὲ καὶ τοῦ Πνεύματος γενομένου ἐν ἡμῖν, ἐλεύσεται ὁ Υἱὸς, καὶ ὁ Πατὴρ, καὶ μονὴν ποιή σουσιν ἐν ἡμῖν. Ἀδιαίρετος γὰρ ἡ Τριὰς, καὶ μία ταύτης ἡ θεότης· καὶ εἷς Θεὸς ἐπὶ πάντων καὶ διὰ πάντων, καὶ ἐν πᾶσιν. Αὕτη τῆς καθολικῆς Ἐκκλη σίας ἡ πίστις· ἐν Τριάδι γὰρ αὐτὴν ἐθεμελίωσε καὶ ἐῤῥίζωσεν ὁ Κύριος, εἰρηκὼς τοῖς μαθηταῖς· «Πο ρευθέντες, μαθητεύσατε πάντα τὰ ἔθνη, βαπτίζοντες αὐτοὺς εἰς τὸ ὄνομα τοῦ Πατρὸς, καὶ τοῦ Υἱοῦ καὶ τοῦ ἁγίου Πνεύματος.» Κτίσμα δὲ εἰ ἦν τὸ Πνεῦμα, οὐκ ἂν συνέταξεν αὐτὸ τῷ Πατρί· ἵνα μὴ ᾖ ἀνόμοιος ἑαυτῇ ἡ Τριὰς, ξένου τινὸς καὶ ἀλλοτρίου συντασσομένου αὐτῇ. Τί γὰρ ἔλειπε τῷ Θεῷ, ἵνα ἀλλοτριοούσιον προσλάβηται, καὶ σὺν αὐτῷ δοξάζηται; Μὴ γένοιτο! Οὐκ ἔστιν οὕτως. «Πλήρης,» αὐτὸς εἶπεν, «εἰμί.» ∆ιὰ τοῦτο αὐτὸς ὁ Κύριος τῷ ὀνόματι τοῦ Πατρὸς αὐτὸ συνέταξεν· ἵνα δείξῃ, ὅτι οὐκ ἐκ διαφόρων, τουτέστιν ἐκ κτίστου καὶ κτίσματος, συν έστηκεν ἡ ἁγία Τριάς· ἀλλὰ μία ταύτης ἡ θεότης ἐστί. Τοῦτο μαθὼν ὁ Παῦλος, ἐδίδασκε μίαν εἶναι τὴν ἐν αὐτῇ διδομένην χάριν, λέγων· «Εἶς Κύριος, μία πίστις, ἓν βάπτισμα.» Ὥσπερ δὲ ἓν βάπτισμα, οὕτως καὶ μία πίστις· ὁ γὰρ πιστεύων εἰς τὸν Πατέρα οἶδεν ἐν τῷ Πατρὶ τὸν Υἱὸν, καὶ τὸ Πνεῦμα, οὐκ ἐκτὸς τοῦ Υἱοῦ· καὶ διὰ τοῦτο πιστεύει καὶ εἰς τὸν Υἱὸν καὶ εἰς τὸ Πνεῦμα τὸ ἅγιον· ἐπειδὴ καὶ μία τῆς Τριάδος ἡ θεότης, ἐξ ἑνὸς τοῦ Πατρὸς γινωσκομένη.