I would consider that when the Trinity was added to the Bible by the late 300's an error had started. I see Muhammad came and corrected that error.
Regards Tony
The Trinity is seen in the 1st century New Testament. Others commented on it long before Nicea.
Heck, the plurality of the Godhead is also seen in the Old Testament. Here's a few examples.
Plurality in Personal Pronouns
Plurality in personal pronouns (such as "us" and "our") when used in reference to the Lord, lends additional documentary evidence for the plurality of God. A good case in point is Genesis 1:26:
"Then God said, 'Let
us make man
in our image, in
our likeness,
and let him have dominion over the fist of the sea, and over the birds
of the air, and over the livestock, and over all the earth."
Here, we see a conversation that is taking place prior to the creation of man. Who is this person or persons with whom God is conversing? First, this 'person' or 'persons' is able to communicate with God in His own realm of timeless eternity. Because man had not yet been created, He was not speaking to someone of earthly intelligence, but someone in the heavenly, supernatural and eternal realm.
Secondly, this person or persons with whom God is communicating apparently has the same kind of creative ability as God ("Let us make"). This clearly implies a cooperative effort between God (Elohim - plural) and the person or person with whom God is speaking.
And finally, the person or persons with whom God is speaking is comparable, or identical, with God ("Let us make man in our image, after our likeness").
When confronted with this passage, skeptics often claim that God is speaking with angels. However, this explanation fails to address a number of problems. First, there is no indication found anywhere in the Bible that says angels can create life. Secondly, nowhere is it indicated that angels were ever made in the image and likeness of God. And finally, there is no indication from scripture that mankind was ever made in the likeness of angels.
Just one more example: In Genesis chapter 11, God is looking down at man's attempt to build the Tower of Babel to make a name for themselves. In verse 7 God states:
"Come, let
us go down and confuse their language so they will not understand one another."
Once more, the personal pronoun "us" is used as a reference to God.
Note that in verse 11:5 it is "the Lord" that is referred to when "us" is later used ("The Lord came down to see the city").