Christianity itself was born into a Hellenized world, and a Syrian world, and a Latin world, and a Coptic world, and a Berber North African world, and so on.
No it was born into a Jewish world and those men spoke Aramaic. When Nathanael first spoke to Jesus he said 'Rabbi, thou art the Son of El; thou art the King of Israel.' Now when John got around to writing it down it was written in Greek. They did speak their own style of Greek mixed with Aramaic something like Old English compared to a southern draw.
The first layer of apologetic writing is the New Testament itself;
Luke 1
1 Forasmuch as many have taken in hand to set forth in order a declaration of those things which are most surely believed among us,
2 Even as they delivered them unto us, which from the beginning were eyewitnesses, and ministers of the word;
3 It seemed good to me also, having had perfect understanding of all things from the very first, to write unto thee in order, most excellent Theophilus,
4 That thou mightest know the certainty of those things, wherein thou hast been instructed.
In all their writings their is no hint of an immaterial substance.
I'm taking this next part from a book called How Creek Philosophy Corrupted the Christian Concept of God, by Hopkins. I'm just giving the general ideas with a few short quotes sprinkled in.
Even in the first generation writings there is no concept of a 'substance' and God the Father is separate from the Son. Polycrap writing between 107 and before 150 completely separates them; "....Who shall believe in our Lord Jesus Christ, and in His Father, who raised Him from the dead". There is another writing by an unknown author but written around 130 ad, he claims he was a disciple of the apostle. He writes "As a King sends his son, who is also king, so sent He Him; as God" (Epistle to Diognetus). He understand the principle of a King and His Prince and allows for the Son to be called God without violating the authority of the Father.
About 160ad those in Rome began calling the Christians atheist and it seems as if the apologist began trying to defend Christianity by framing it within the Hellenistic or metaphysical terminology . It is Justin who first starts using words which are unbiblical he calls the Father "unbegotten", no where in the Bible is the word used. Tatian presence a Hellenize view of God, "God is spirit, not pervading matter...".
Melito writing in 172 ad really starts using Greek wording and metaphysical terms. "There 'is' that which really exists and is called God....He changeth not, while everything else changes .... no eye can see him nor thought apprehend Him, nor language describe Him....", However he still separates the Father and Son; "...This is He who made the heaven and the earth and in the beginning
together with the Father, fashioned man..."
In 177 ad Athenagoras goes all out and fully express God as any good platonistic Greek mind would;
But unto us, who distinguish God from matter and teach that matter is one thing and God another..."
He goes on from there incorporating more and more of Plato's metaphysical ideas. After that it's all down hill and the true Biblical God is lost in Greek Philosophy.
So when you start quoting someone from 300 ad I'm not impressed, he's just building upon non Biblical ideas getting further and further away the true God of the Bible.