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Jesus is not the word, he is what the word became (John 1:14). In the OT the word logos(word) never meant a person.
I disagree, consider 1 Sam. 3:1:
Now the boy Samuel was ministering to the Lord under Eli. The word of the Lord was rare in those days; visions were not widespread.
Now what does the “word of the Lord” have to do with
visions not being widespread? Generally speaking we don’t see words, we hear them (unless they’re written down, but that’s beside the point). So what does this tell us about the nature of God’s Word, namely that it must be something, or someone, that can be seen.
Also if the Word of God IS God (as John 1:1 states) then how can God become anything less than God? John doesn’t say the Word created flesh, but BECAME flesh. Just because Jesus is what the Word became doesn’t mean the Word stopped being God.
But on to general support for the deity of Christ (I will assume you and I can both agree that the Father is God is a given):
There is one and only one God
“Moses said to God: Lo, I shall go to the children of Israel, and say to them: The God of your fathers hath sent me to you. If they should say to me: What is his name? what shall I say to them? God said to Moses: I AM WHO AM. He said: Thus shalt thou say to the children of Israel: HE WHO IS, hath sent me to you. And God said again to Moses: Thus shalt thou say to the children of Israel: The Lord God of your fathers, the God of Abraham, the God of Isaac, and the God of Jacob, hath sent me to you: This is my name
for ever, and this is my memorial unto
all generations.” (Exodus 13:13-15)
“Hear, O Israel, the Lord our God is one Lord.” (Duet 6:4)
“Before me no god was formed, nor shall there be any after me. I, I am the Lord, and besides me there is no savior.” (Isa 43:10)
“Do not fear, or be afraid; have I not told you from of old and declared it? You are my witnesses! Is there any god besides me? There is no other rock; I know not one.” (Isa 44:8)
“Thus says the Lord, your Redeemer, who formed you in the womb: I am the Lord, who made all things, who alone stretched out the heavens, who by myself spread out the earth” (Isa 44:24)
“I am the Lord, and there is no other; besides me there is no god. I arm you, though you do not know me” (Isa 45:5)
“You are right, Teacher; you have truly said that ‘he [God] is one, and besides him there is no other’;” (Mark 12:32)
“Hence, as to the eating of food offered to idols, we know that ‘no idol in the world really exists,’ and that ‘there is no God but one.’ Indeed, even though there may be so-called gods in heaven or on earth—as in fact there are many gods and many lords— yet for us there is one God, the Father, from whom are all things and for whom we exist, and one Lord, Jesus Christ, through whom are all things and through whom we exist.” (1 Cor 8:4-6) (Now this verse might seem to draw a distinction between God and Lord, but this verse must be read in the context of the OT, which proclaims “The Lord our God is one Lord”. The Lord IS God, therefore while Paul distinguishes between the Father and the Son (as does the Catholic Church today, they are distinct persons) they are fundamentally one Being, one God, and consubstantial. Here Paul affirms monotheism over polytheism and identifies the one God, but in his language identifies Christ with the traditional Jewish term used as a substitute for the divine name)
Jesus is God
"For to us a child is born, to us a son is given; and the government will be upon his shoulder, and his name will be called “Wonderful Counselor, Mighty God, Everlasting Father, Prince of Peace.” (Isa 9:6)
“Thomas answered him [Jesus], ‘My Lord and my God!’” (John 20:28)
“Jesus said to them: Amen, amen I say to you, before Abraham was made, I am.” (John 8:58)
“My Father and I [Jesus] are one.” (John 10:30)
“The Jews answered, “It is not for a good work that we are going to stone you, but for blasphemy, because you, though only a human being, are making yourself God.” (John 10:33)
“who, though he was in the form of God, did not regard equality with God as something to be exploited, but emptied himself, taking the form of a slave, being born in human likeness. And being found in human form” (Phil 2:6-7) (How can one be in the form of or equal to God without actually being God? This verse shows that Jesus has two natures, one divine and one human, He is both fully human and fully God. This is the Catholic teaching.)
“For in him dwelleth all the fulness of the Godhead bodily.” (Col 2:9 KJV) (How can the fullness of three Persons dwell in only one Person without that Person being the same Being as the other Persons? Unless Jesus is God how can the fullness of God dwell in His body?)
“but in these last days he has spoken to us by his Son, whom he appointed heir of all things, and through whom also he made the universe. The Son is the radiance of God’s glory and the exact representation of his being, sustaining all things by his powerful word. After he had provided purification for sins, he sat down at the right hand of the Majesty in heaven.” (Heb 1:2-3) (see the Son IS the Word and the EXACT representation of God…and isn’t an EXACT representation of something the same as the thing itself?)
Also read the rest of Hebrews 1. I have not addressed the deity of the Holy Spirit here, I will leave that for someone else as that it’s getting late. There are many other arguments for the Trinity out there, this is just some of the verses.