Tertullian in the early third century wrote:
Now if this one [the Word] is God according to John ("the Word was God"), then you have two: one who speaks that it may be, and another who carries it out.
However, how you should accept this as "another" I have explained: as concerning person, not substance, and as distinction, not division.

And a little later:
And that you may think more fully on this, accept also that in the Psalm two gods are mentioned: "Thy throne, God, is forever, a rod of right direction is the rod of thy kingdom; thou hast loved justice and hated iniquity, therefore God, thy God, hath anointed thee."
If he is speaking to a god, and the god is anointed by a god, then also here he affirms two gods... More is what you will find just the same in the Gospel: "In the beginning was the Word, and the Word was with God, and the Word was God": One who was, and another in whose presence he was.

Origen of Alexandria, a teacher in Greek grammar of the third century, wrote about the use of the definite article:
We next notice John's use of the article in these sentences.
He does not write without care in this respect, nor is he unfamiliar with the niceties of the Greek tongue.
In some cases he uses the article, and in some he omits it.
He adds the article to the Logos, but to the name of God he adds it sometimes only.
He uses the article, when the name of God refers to the uncreated cause of all things, and omits it when the Logos is named God [...] Now there are many who are sincerely concerned about religion, and who fall here into great perplexity.
They are afraid that they may be proclaiming two Gods, and their fear drives them into doctrines which are false and wicked.
Either they deny that the Son has a distinct nature of His own besides that of the Father, and make Him whom they call the Son to be God all but the name, or they deny the divinity of the Son, giving Him a separate existence of His own, and making His sphere of essence fall outside that of the Father, so that they are separable from each other. [...]
The true God, then, is "The God."
Tertullian in the early third century wrote:
Now if this one [the Word] is God according to John ("the Word was God"), then you have two: one who speaks that it may be, and another who carries it out. However, how you should accept this as "another" I have explained: as concerning person, not substance, and as distinction, not division.
And a little later:
And that you may think more fully on this, accept also that in the Psalm two gods are mentioned: "Thy throne, God, is forever, a rod of right direction is the rod of thy kingdom; thou hast loved justice and hated iniquity, therefore God, thy God, hath anointed thee." If he is speaking to a god, and the god is anointed by a god, then also here he affirms two gods... More is what you will find just the same in the Gospel: "In the beginning was the Word, and the Word was with God, and the Word was God": One who was, and another in whose presence he was.
Origen of Alexandria, a teacher in Greek grammar of the third century, wrote about the use of the definite article:
We next notice John's use of the article in these sentences. He does not write without care in this respect, nor is he unfamiliar with the niceties of the Greek tongue. In some cases he uses the article, and in some he omits it. He adds the article to the Logos, but to the name of God he adds it sometimes only. He uses the article, when the name of God refers to the uncreated cause of all things, and omits it when the Logos is named God [...] Now there are many who are sincerely concerned about religion, and who fall here into great perplexity. They are afraid that they may be proclaiming two Gods, and their fear drives them into doctrines which are false and wicked. Either they deny that the Son has a distinct nature of His own besides that of the Father, and make Him whom they call the Son to be God all but the name, or they deny the divinity of the Son, giving Him a separate existence of His own, and making His sphere of essence fall outside that of the Father, so that they are separable from each other. [...] The true God, then, is "The God."
John 1:1