His Word never goes out void.
I've been thinking of where I differ with most trinitarians and where, not only Muslims, but Jews also have problems with the trinity doctrine, though as said, I do believe we have a Triune or Tripartite God. We also being created tripartite.
To try to show through Scripture my thoughts - to add to the verses given above - though if you begin to cross-reference these, it would cover more than could be posted.
1Ti 3:16 And without controversy great is the mystery of godliness: "God was manifest in the flesh", justified in the Spirit, seen of angels, preached unto the Gentiles, believed on in the world, received up into Glory.
Php 2:6, 7 Who, being in the form of God, thought it not robbery to be 'equal with God': But 'made himself' of no reputation, and 'took upon him' the form of a servant, and 'was made' in the likeness of men
John 20:28 And Thomas answered and said unto Him, My Lord and my God.
Who "walked & talked in the Garden" with Adam?
Can we see that happening in the first 7 verses of Rev 21? (Jeremiah 31).
Rev 21:7 = 2Co 6:18 And will be a Father unto you, and ye shall be my sons and daughters, saith the Lord Almighty.
Adam Clarke, just for one, sees Rev 21 as when the three-in-One are no longer "seperate" but "undivided and Eternal" --- as GOD was "from the beginning".
My opinion, from what Scripture I read, is not in agreement with the teaching of the Eternal 'Son'.
The Eternal Logos, yes - but not the Eternal Son.
A son is in submission to a father. Jesus "was made"/"begotten" on a certain day and while in the flesh, He submitted to "the Father" by "The Spirit", as we're supposed to. He was our Creator, humbling Himself for His Creation, being our example of how to live a Spirit indwelled life - under submission and then dying to be GOD our Savior.
The GOD we see in Rev 21 is One GOD - Completely coEqual.
Heb 1:1-13 - can all be cross-referenced to the O.T. - but just to cover a few of these verses --
" "This day" (on a certain day - at conception) - have I 'begotten' thee." (Ps 2:7, Acts 13:33) and -
"I 'will be' (future tense) to him a father and he "shall be" (future tense) to me a son.
"Sit on my right hand, 'until' I make thine enemies they foot footstool."
...... "Until" that day described in Rev 21.
Heb 2:9 "who was 'Made'....." - (was 'made' a son)
"GOD our Savior" (Titus 1:1, 1:3, 2:3, 3:4, 4:10)
Col 2:9 For in Him dwelleth 'all the fulness' of the Godhead bodily.
Mark 12:29 - Jesus answered - "Hear, O Israel; The LORD our GOD is One LORD."
Joh 17:5 And now, O Father, glorify thou me with thine own self 'with the glory which I had with thee before the world was.'
Gen 17:1 And when Abram was ninety years old and nine, the LORD (Who?) appeared to Abram, and said unto him, I am "the Almighty God"; walk before me, and be thou perfect.
Rev 1:8 I am Alpha and Omega, the beginning and the ending, saith the Lord, which is, and which was, and which is to come, "the Almighty."
Rev 11:17 Saying, We give thee thanks, O Lord "God Almighty", which art, and wast, and art to come; because thou hast taken to thee thy great power, and hast reigned.
How many "Almighty GODs" are there? From OT to New, there is only One Almighty GOD.
Isa 45:20 Assemble yourselves and come; draw near together, ye that are escaped of the nations: they have no knowledge that set up the wood of their graven image, and pray unto a god that cannot save.
Isa 45:21 Tell ye, and bring them near; yea, let them take counsel together: who hath declared this from ancient time? who hath told it from that time? have not I the LORD? and there is no God else beside me; a just God and a Saviour; there is none beside me.
Isa 45:22 Look unto me, and be ye saved, all the ends of the earth: for I am God, and there is none else.
Isa 45:23 I have sworn by myself, the word is gone out of my mouth in righteousness, and shall not return,
That unto me every knee shall bow, every tongue shall swear.
Isa 45:24 Surely, shall one say, in the LORD have I righteousness and strength: even to him shall men come; and all that are incensed against him shall be ashamed.
1Ti 1:17 Now unto the King eternal, immortal, invisible, the only wise God, be honour and glory for ever and ever. Amen.
Jud 1:25 To the only wise God our Saviour, be glory and majesty, dominion and power, both now and ever. Amen.