false
Elohym: There are several ways to make a word plural in Hebrew. One way is to add hiym to the ending. Note Abram = father of people, changed to Abahym = father of peoples. Cherub one angel, cherubim many angels. “Elowahh” translates to God 52 times and its plural form “elohiym” is used 2347 times referring to YHWH God. In Genesis 1:1-26 we read that God was in the beginning and that He created this, He created that, and that He called them good. In all 26 verses God translates from elohiym. In vs. 26God said “Let us make…” The Triune Council created man. When God said “Let us make…”, “us” could not have been any others, such as angels, for all others were created by God and only God creates. In Genesis the Triune Council is in the beginning, and in John “Logos” is alongside God. [Plurality]
Is 6:8 Also I heard the voice of the Lord, saying: “Whom shall I send, And who will go for Us?”
Gen 11:7 Come, let Us go down and there confuse their language, that they may not understand one another’s speech.
Gen 3:22 Then the Lord God said, “Behold, the man has become like one of Us, to know good and evil. And now, lest he put out his hand and take also of the tree of life, and eat, and live forever”
26 Then God said, “Let Us make man in Our image, according to Our likeness...” 27 So God created man in His own image; in the image of God He created him; male and female He created them.
false
Jn 17:5 And now, O Father, glorify Me together [b]with Yourself, with the glory which I had with You before the world was.
Scripture indicates that Christ's Sonship is an eternal Sonship. It is one thing to say that Jesus became the Son of God; it is another thing altogether to say that He was always the Son of God. We must recognize that if there was a time when the Son was not the Son, then, to be consistent, there was also a time when the Father was not the Father. If the first person's designation as "Father" is an eternal title, then the second person's designation as "Son" must be so regarded.
False
And when Jesus had cried out with a loud voice, He said, “Father, ‘into Your hands I commit My spirit.’ (Lk 23:46).
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, (Mt 28:19).
And I will pray the Father, and He will give you another Helper...(Jn 14:16).
1When He had been baptized, Jesus came up immediately from the water; and behold, the heavens were opened to Him, and He saw the Spirit of God descending like a dove and alighting upon Him. 17 And suddenly a voice came from heaven, saying, “This is My beloved Son, in whom I am well pleased.” (Mt 3:16–17).
I'll summarize here:
ELOHIM
No, it is shameful mythology for Trinitarians to torture the Hebrew Elohim and Echad. Since you mention Elohim, I recommend that you do a more thorough word study. Since you are a non-Hebrew speaking person pay special attention to how the word is used in other places such as its reference to the singular false god Dagon. Dagon was not a trinity. I'm not exaggerating when I say that your misuse of the term is shameful.
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US
No, you ignore over 7,000 singular pronoun references to God in the OT and you bring 4 "us" verses. In Genesis 3 God is speaking to the angels because he posts an angel to keep the Tree of Life. In Isaiah 6, he is speaking to the host of heaven because Isaiah volunteers. In Genesis 11 it is unclear who God is talking to, but using angels to bring judgment is commonplace in the OT. In Genesis 1, which is a favorite Trinitarian verse, actually says absolutely nothing about who God is talking to and does not mention persons or a Trinity or anything such thing. This is your OT evidence for a Trinity? That's nonsense.
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BEFORE THE WORLD WAS
John 1:1 answers to the identity of Jesus from eternity. John 14 says nothing of an eternal Son. You are reading into it what is not there. Please read the biblical definition of why the Son of God is called the Son in Luke 1:35.
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Holy Spirit
Of course, there is an obvious distinction between the flesh and spirit, and between humanity and deity, but since Jesus is the one God manifested in the flesh then it is clear he is the Holy Spirit in regards to his essence or divine nature. The Messiah was the perfect man, the fullness of deity tabernacled among us. What you are doing is drawing way too Roman much distinction and difference between Father, Son and Holy Ghost and mischaracterizing the relationships. Romans 8:4-10 makes it clear that the Spirit of Christ or the abiding Christ Himself is the Holy Spirit.
Isaiah 9:6 calls Jesus the Father. Revelation 21:7 teaches that Jesus is our Father. The Apostles understood the words of Jesus in Matthew 28:19 to mean the name of Jesus because this is this is how they baptized throughout the book of Acts. All the fullness of the Godhead dwells in him bodily (Colossians 2:9).
You were robbed of sound theology according to Paul's prophetic words in Colossians 2:8, so you are used to thinking of God as three. Rather than grasp for elohim plurality straws, I would highly recommend taking a fresh look at the simplicity and beauty of Christ as the one true God. We are complete in him (Colossians 2:9).