Homer wrote:If I understand you, divinity is "what you are composed of", Father and Son are the positions held, but then what does "God" refer to?
Yes, that's fairly close, but not quite. "Divinity" or "God" is what the Son
IS,id est, his essence. Just as your essence is "man" and not "dog" or "cat" or "God" (Divinity).
What confuses the issue for some is that "God" is used in two different ways in John 1:1 while they presume it is used in the same way. In the clause "The Logos was with the God", the words "the God" refers to the One Real God whom Jesus addressed as such as recorded in John 17:3.
In the next clause "The Logos was God", the word "God" refers to the essence of divinity. It tells the KIND OF THING the Logos is. The order of the words indicates this. Literally they are "and God was the Logos" (with no article before "God"). This word order, placing "God" before the verb "was" is characteristic of Greek grammar. Here are two other places in which this is done:
"God is love" (1 John 4:8). The word order is "The God love is." Notice "love" is placed BEFORE the verb "is". This is done to show that "love" is the kind of thing or quality that the God IS. The same clause is used in 1 John 4:16.
Another example: "Your word is reality (or "truth")" (John 17:17). The word order is "Your word reality is". Again by placing "reality" BEFORE "is" instead of after it, indicates that Jesus is affirming that reality is the kind of thing God's word is.
Martin Luther, whatever else he was, was a good Greek scholar. He said it very succinctily:
"The lack of an article is against Sabellianism; the word order is against Arianism"
Sabellianism was a form of Modalism, the concept that that God is a single divine Being who expressses Himself as the Father, and as the Son, and as the Holy Spirit, just as an actor can express himself as three different characters by wearing three different masks. So if the apostle John had been a Modalist, he would have written, "The Logos was
the God", meaning that the Logos was the same Person as the One Real God.
Arianism is thought to have taught that the one Real God
created his Son. (Though the Arians used the the word "begat" not "created"). In any case, Luther thought an Arian would translate the clause as "And the Logos was a god" (as the NWT has it). If that had been the intention of the apostle John, he would have had the words in natural order. rather than placing "God" before "was".
You can tell by listening to a person read John 1:1 whether or not he understands it in the way intended. If he puts the emphasis on "was", that is, "And the Logos WAS God", you know that he thinks it is saying that the Logos was the great God Himself, as a Modalist believes. Indeed the word "was" is where almost everyone puts the emphasis. However, if the reader puts the emphasis on "God", that is, "And the Logos was GOD", you know that he understands that it is saying that God, (or Divinity, or Deity) is the very essence of the Logos.