-—. NOWHERE in the New Testament is there a Trinitarian test.——
Where did you get the idea that every religious truth must be explicitly stated in the Bible? At the very least, this idea should appear in the Bible.
Your rejection of the Trinity is the logical consequence of Luther’s doctrine of “the Bible ALONE.”
The drift of all he advanced was this: to deny that in any true sense God could have a Son; as Mohammed tersely said afterwards, "God neither begets, nor is He begotten" (Koran, 112). We have learned to call that denial Unitarianism. It was the ultimate scope of Arian opposition to what Christians had always believed. But the Arian, though he did not come straight down from the Gnostic, pursued a line of argument and taught a view which the speculations of the Gnostic had made familiar. He described the Son as a second, or inferior God, standing midway between the First Cause and creatures; as Himself made out of nothing, yet as making all things else; as existing before the worlds of the ages; and as arrayed in all divine perfections except the one which was their stay and foundation. God alone was without beginning, unoriginate; the Son was originated, and once had not existed. For all that has origin must begin to be.
As his reference to Mohammed implies, Arius view of the relationship between Father and Son was very like that of Mohammed. Which is one reason why Islam made such quick headway among the lands of north Africa and Spain overrun by the Muslims after 632.
I'm very sorry, friend. This first statement about Arianism being Christianity is simply false. Arius taught that Jesus was not co-eternal, but created at a finite point in chronos time. In Arius' own words, "There was a time when the Son was not." This contradicts the words of Christ, as recorded in the 8th chapter of the Gospel According to St. John, when he answered the Pharisees, "...before Adam was even born, I AM."
"The earliest Christians were not Trinitarians..."
Again, I'd point you to the Gospels, this time that of St. Matthew, 28:19, "Go therefore and make disciples of all the nations, baptizing them in the name of the Father and of the Son and of the Holy Spirit."
So, I offer to you the words of Jesus Christ on these matters.