Pre-Nicene triadic language — honest, not anachronistic slogans.
And concerning baptism, baptize this way: Having first said all these things, baptize into the name of the Father, and of the Son, and of the Holy Spirit, Matthew 28:19 in living water. But if you have not living water, baptize into other water; and if you can not in cold, in warm.
Περὶ δὲ τοῦ βαπτίσματος, οὕτω βαπτίσατε: Mt. 28, 19 ταῦτα πάντα προειπόντες, βαπτίσατε εἰς τὸ ὄνομα τοῦ πατρὸς καὶ τοῦ υἱοῦ καὶ τοῦ ἁγίου πνεύματος ἐν ὕδατι ζῶντι.
Hence are we called atheists. And we confess that we are atheists, so far as gods of this sort are concerned, but not with respect to the most true God, the Father of righteousness and temperance and the other virtues, who is free from all impurity.
Ἔνθεν δὲ καὶ ἄθεοι κεκλήμεθα· καὶ ὁμολογοῦμεν τῶν τοιούτων νομιζομένων θεῶν ἄθεοι εἶναι, ἀλλ᾿ οὐχὶ τοῦ ἀληθεστάτου καὶ πατρὸς δικαιοσύνης καὶ σωφροσύνης καὶ τῶν ἄλλων ἀρετῶν ἀνεπιμίκτου τε κακίας θεοῦ· ἀλλ᾿ ἐκεῖνόν τε καὶ παρ᾿ αὐτοῦ υἱὸν ἐλθόντα καὶ διδάξαντα ἡμᾶς ταῦτα, καὶ τὸν…
That we are not atheists, therefore, seeing that we acknowledge one God, uncreated, eternal, invisible, impassible, incomprehensible, illimitable, who is apprehended by the understanding only and the reason, who is encompassed by light, and beauty, and spirit, and power ineffable, by whom the universe has been created…
Τὸ μὲν οὖν ἄθεοι μὴ εἶναι, ἕνα τὸν ἀγένητον καὶ ἀΐδιον καὶ ἀόρατον καὶ ἀπαθῆ καὶ ἀκατάληπτον καὶ ἀχώρητον, νῷ μόνῳ καὶ λόγῳ καταλαμβανόμενον, φωτὶ καὶ κάλλει καὶ πνεύματι καὶ δυνάμει ἀνεκδιηγήτῳ περιεχόμενον, ὑφ᾿ οὗ γεγένηται τὸ πᾶν διὰ τοῦ αὐτοῦ λόγου καὶ διακεκόσμηται καὶ…
He Next Teaches Us that the Authority of the Faith Enjoins, After the Father and the Son, to Believe Also on the Holy Spirit, Whose Operations He Enumerates from Scripture.
In Fine, Notwithstanding the Said Heretics Have Gathered the Origin of Their Error from Consideration of What is Written: Although We Call Christ God, and the Father God, Still Scripture Does Not Set Forth Two Gods, Any More Than Two Lords or Two Teachers.
Further, that the Same Rule of Truth Teaches Us to Believe, After the Father, Also in the Son of God, Jesus Christ Our Lord God, Being the Same that Was Promised in the Old Testament, and Manifested in the New.