Life eternal is to know God the Father and The Lord Jesus Christ whom he has sent. The trinitarian doctrine is the central mystery and doctrine of Orthodox Christianity.
What do you mean my central mystery?
The central doctrine of Catholicism is this: Christ has died. Christ has risen. Christ will come again.
The nature of the Godhead and the deity of Christ was decided by vote done by men.
No it wasn’t.
It’s a dogma essent ail for salvation.
Jesus Christ is indeed essential for salvation. Understanding Who He is, is essential to understanding salvation.
I believe the scriptures make a far stronger indication that Jesus and the Father are seperate beings. Stephen has his vision of heaven, and says that He saw God the Father and The Lord Jesus sitting at his right hand side. Who does he refer to as God in this vision?
I don’t believe scriptural interpretation is up to you.

The Catholic Church, that I accept as the authoritative interpreter of scripture, explains it thus:
Henceforth Christ is seated at the right hand of the Father: “By ‘the Father’s right hand’ we understand the glory and honor of divinity, where he who exists as Son of God before all ages, indeed as God, of one being with the Father, is seated bodily after he became incarnate and his flesh was glorified.” (CCC 663)
Some points as well- (1) Orthodox Christianity came to accept that the Father was the Creator, rather than having created through Jesus Christ.
I don’t know where you got this idea, but it is incorrect.
(2) It came to accept that the Father was the God or LORD of the Old Testament. But the Bible shows that this personage was actually Christ (I Cor. 10:1-4).
We understand God as, Father, Son and Holy Spirit. God is present in the Old and New Testament.
(3) Orthodox Christianity believed that many people had spoken with the Father (in the Old Testament). Yet Jesus declared that no man had seen or heard the Father (John 5:37). And, because the Father was unknown to the world, one purpose of Christ’s coming was to reveal Him (John 1:18, Luke 10:22).
Maybe you should not start your points by telling us what we believe, because, I don’t see that we are in disagreement here. I recommend that your read Justin Martyr’s “Dialogue with Trypho”.
(4) It came to believe that the Father and Son are “one” by some mystical way. However, the Bible says the Father and Son are “one” in the same sense that all members of the Church are “one” in unity and purpose (John 17:11).
You have one prooftext, and this alone could be, and has been, its own thread.
(5) Orthodox Christianity accepted the premise of Judaism concerning monotheism—that God was one being. Yet two distinct Beings are identified in the beginning of John’s gospel (1:1-2). Likewise, Genesis 1:26 records a conversation between these two God Beings. Notice: “And God said, Let Us make man in Our image…” The word “God” derives from the Hebrew Elohim (a plural term—actually a collective noun—similar to kingdom, family or church).
Two distinct persons are identified. Yet, God is one being. The premise isn’t Jewish, it is scriptural. God brought Israel out of polytheism to an understanding that is clearly expressed post-exilic, that God is ONE. Do you not believe that God led Israel to a correct understanding of Himself?
Rather than the God Family being a closed trinity, as accepted by Christianity, this Family will expand through the many begotten sons of God yet to be born into it (John 1:11-12; Rom. 8:14, 19; I John 3:1-
Theosis, partaking in the divine nature of God.
Also, another subject that can be its own long thread, and has been several times.