Won't fly anywhere I've been. Items:
1) Includes multiple statements which God has not said. Therefore, this is human reasoning which does not have the impact of the actual Words of God Himself.
2) The prophets and apostles, and others, who wrote the Bible, had human reasoning, and also had words that God Himself spoke, which have impact infinitely beyond all human reasoning.
3) For almost all of the bits of trinitarianism completely outside Christ, try the Mithraist cult, or quite a lot of Hindu variations, or some American Indian input.
To be effective, it is the very things God quotes Himself as stating within Holy Scripture, which are the focus, the beginning and the end and the general function.
I have to agree with Bruce.Leiter, and so does Peter:
"For prophecy never had its origin in the human will, but prophets, though human, spoke from God as they were carried along by the Holy Spirit". (2 Peter 1:21).
But the Bible clearly states that Jesus was God in the flesh: "
In the beginning was the Word, and the Word was with God, and the WORD WAS GOD". (John 1:1). That same WORD which was GOD then came and inhabited a human body: "And the Word was made flesh, and dwelt among us, (and we beheld his glory, the glory as of the only begotten of the Father,) full of grace and truth". (John 1:14) God came and dwelt in human flesh (Immanuel: "God with us")
It's amazing, that though this is clearly taught, many deny it and say Jesus was not God.
But the teaching of the Trinity is truly taught by revelation of the Spirit. The Bible does not have the word TRINITY in it---but the Bible clearly teaches it in many places. It is understood by divine revelation, not by human wisdom. That is why the Jehovah's Witnesses cannot accept it--they use human wisdom to try to understand the Trinity. It cannot be done. Here is one instance of the Trinity clearly taught in Scripture, but only understood if taught by the Spirit:
"And JESUS, when he was baptized, went up straightway out of the water: and, lo, the heavens were opened unto him, and he saw the SPIRIT OF GOD descending like a dove, and lighting upon him:
And lo A VOICE FROM HEAVEN, saying, This is my beloved Son, in whom I am well pleased. (Matt. 3:16,17)
It is clear: I have capitalized the (3) Persons: JESUS, SPIRIT OF GOD, A VOICE FROM HEAVEN (THE FATHER). But the natural man cannot understand or accept this. This is a teaching that is understood by divine revelation. The Father through the Spirit must reveal it's truth to you.