I do agree. But, you do confuse me all the time. I believe that, on the first page of your dissertation, you stated that you accept the doctrine of the trinity (Nicaen Christology), ...which I both unequivocally and vehemently denounce, or any doctrine that deifies Jesus. When you say oneness then, do you mean trinitarian theology, or modalism? Or, if I may, what is your Christology - just so that i can follow your line of thinking (the history I already know). I, myself, personally believe that the only divine being in all the universe, is God, the Father. And that Jesus was a created being with no existence or consciousness prior to 4bc+-, and was exalted to God's right-hand side to judge all mankind, and be ruler of all God's creation.
Ya know just to kid with ya.....there is a long write up here to make it clear. What we know, what we cannot know, and what we can speculate on. To put it in other words.....
God the Father....Yahweh....Full fledged God and God Supreme.....Creator of heaven and earth...and Man.
God the Son....Yeshua....Full fledged God...begotten Son of God...in all respects Son of God....Savior of Mankind.
God the Holy Spirit....name not revealed...Full fledged God....as described helper, teacher, guide, spirit of faith and all that is good.
All three Gods are separate, with their own mind, wills, abilities, and presence, such as they can sit side by side on three thrones. Spirit... physical...as they choose. The ecumenical councils tried to define their nature....that would be the folly of fools. Even to attempt to determine that they are the same nature....lol...like a nature we could comprehend...lol
Is Christ created or born....do Gods perceive time and interact with time differently then humans....Can a God that is born, have a presence in the past and the future...? It is an interesting topic.
The union is defined as three Gods in perfect accord. Not merged or a God with three aspects, which would be a common Pagan theme. And there is another thing to consider, Yeshua was a unique being, in that He was man and God. As we say 100% Man and 100% God, now where is the dividing line....Spiritually God and physically man? Hard to say, but I do not think a mere man could have taken the beating He took and still stand up. So I think that 100% Man and 100% God is reasonably accurate, in that it was an intermingling of God and human....speculation of course.
So here is the other thing to consider, when Christ ascended to the Father, did he take His humanity with Him? Did this change anything? Did this bring the Gods and humanity even closer together? Some people will argue that....it is admittedly a speculation.
So this union, is not about arithmetic. There is no mystery here. Christ describes this unity Himself and it is solidarity. This "oneness" is solidarity in a form of a relationship that Christ explains, that we will achieve with the three Gods....which still can be called the Trinity. but as Christ said.
John 17:22
“And the glory which to them; that they may be one just as We are one.”....we are not going to be Gods, it is the glory of our relationship with the Trinity....the family of God....the children of God, that Christ is referring to.
So now on the history side of it. The oneness formula for the Trinity was enforced...it was not true. Still the question is, to be fair, was it the best decision under the circumstances? There were various beliefs and concerns being argued by the churches that this doctrine stops. It did not resolve the issues, it stops the disagreements, even some of the issues of the Gnostics. It allowed the churches to unify and Emperor Constantine orders and financed the copying of the selected texts to be bound in the first Christian book....the Bible...the Fifty Bibles of Constantine.
Not that the churches were in perfect agreement, the Coptics were out there doing their own thing, but if Constantine would not have been successful in bringing the churches together and they would have went on to go different directions, at that point, where would we be today?