As it says, “I am the Lord, that is My name; I will not give My glory to another, nor My praise to graven images” (Isaiah 42:8).
Therefore there is one God in heaven, and God does not share His glory. Therefore if Christ shares in God’s glory (which he does according to John 17), and if he is deity, then He is included in this one God, and cannot be a separately identified being.
I have heard that Mormons say these scriptures, and all the Old Testament references to God, are the revelation of Christ, that is, Jesus Christ is called “LORD” (YHWH) and “God,” and it is He who is speaking here. If that were the case, it does not help at all, since Christ would then be excluding the Father from Godhood and claiming all of it for himself. So there remains a single God according to scripture.
Christ is God.
For this is how Jacob had the dream at Bethel, in which he saw the Lord standing in the clouds above the ladder, in heavenly glory (Genesis 28:13), and at Peniel he wrestled with God in the form of a man, and said “I have seen God face to face” (Genesis 32:30).
Furthermore Paul writes, “For in Christ all the fullness of the Deity lives in bodily form” (Colossians 2:9).
The Lord Christ said, “I tell you the truth, before Abraham was, I AM,” (John 8:58) making himself out to be the same as God on High, the Eternal One, so clearly that the Pharisees were enraged as his “blasphemy” and picked up stones to kill him.
And later in John 14:8-9: “Philip said, ‘Lord, show us the Father and that will be enough for us.’ Jesus answered: ‘Don’t you know me, Philip, even after I have been among you such a long time? Anyone who has seen me has seen the Father. How can you say, ‘Show us the Father’?’”
So if anyone who has seen Christ has seen the fullness of God the Father, how can you say they are one in purpose only? If I go as an ambassador to the U.N., unswervingly intent on the same goals as the president, even then, can I say that he who has seen me has seen the president? No, I can never assert myself to be the true president unless I am he.
If Christ is God at all, He must be one in essence, nature, and substance with the Father to the point of being this One God, because God is one. Therefore Jesus is not one with the Father in purpose alone, but as the very same Being!
Christ was not created.
Presupposition: Christ is either created or he was not created.
Presupposition: The only thing that is not created is God, the Creator.
The scriptures say, “yet for us there is but one God, the Father, from whom all things came and for whom we live; and there is but one Lord, Jesus Christ, through whom all things came and through whom we live” (1 Corinthians 8:6). John also testifies, “Through him all things were made; without him nothing was made that has been made” (John 1:3).
But how can He be created through whom came all things? Can the blacksmith’s hammer pouind itself into shape on the anvil? So if it was through Christ that the world was made, he cannot be a part of the world. Therefore he must be God, since the only thing that is not created is God.
Godhood is eternal.
The Father does not change. “Every good and perfect gift is from above, coming down from the Father of the heavenly lights, who does not change like shifting shadows” (James 1:17). Elsewhere God is referenced: “…With Whom there is no change” (Psalm 55:19). Therefore he cannot have added to himself or subtracted from himself at any point. He is wholly who he is and ever was and ever will be. Therefore, if Jesus Christ is God, sharing in his nature, neither does he change, since God does not. If Christ is co-equal with the Father, truly deity, then he must have always been so, and necessarily will always be so.
But Jesus is more accurately “like” God, you might say. If Jesus Christ is like God, we must define how exactly he is like God – in which attributes? There are many absolute attributes of God for which there is a stark “yes” or “no.” For example, if he is holy, he must be fully so, there is no “partially holy.” Does he therefore share in God’s (1) omnipotence, (2) omniscience, (3) omnipresence, (4) eternality, (5) perfection, and (6) pure agape love? If Jesus does not share in these attributes, I ask how he really shares in the nature of the Father at all? He seems less than God – a very great angel, perhaps, but not deity worthy of worship, while there is Another who does in fact possess such attributes. If Jesus does share in these attributes with God, then I ask how he could have ever not done so? For how could the Father, at that point lacking that which is eternal, perfect, and all-powerful (Christ), at the same time be perfect and complete? So you see we have taken a roundabout way to the same conclusion: that to be really like God is necessarily an eternal status, not something that can be gained or lost. Therefore If Christ is God, he has eternally been God, since Godhood is eternal.
Without complete Godhood Christ’s sacrifice is insufficient.
There is none righteous but God alone (Isaiah 59). “They will say of me, ‘In the LORD alone are righteousness and strength.’” (Isaiah 45:24). “For you alone are holy” (Revelation 15:4). God requires a spotless lamb as a sacrifice for sin. So the only one who is spotless enough to ultimately appease God on our behalf is a 100% sinless sacrifice. The 100% sinless sacrifice must be 100% godly. And no one is 100% godly save God Himself. If Christ were less than entirely God, he would be made in the smallest bit of incompletely sinless stuff. And that one tiny fraction of imperfection in that one tiny part of him would render him completely imperfect, because perfection is pure; it is “yes” or “no,” not “mostly.” So if only God is perfect, then to be the perfect, spotless lamb requires that you be fully made of God. Therefore Christ must have had complete, unadulterated godhood if his sacrifice was to cover over the sins of all humanity.
To believe Jesus was less than God is to believe he is a sign on the way to God, not the way itself. If Jesus is God Himself, and only then, he is able to connect you from the earth to heaven, having a foot secure in both places by the glory of his hypostatic union.
Christ holds a unique role of sonship to God unlike any other man.
Christ To be saved you must believe in the “only begotten son” of God (John 3:16)– begotten, not created. For “begotten” means to be born of, to issue forth from, be one in essence with. It means that Jesus was the only one of God’s children that was his child in this special way. All mankind is children of God as created children, but God did not beget any man of His essence like He begot Jesus. Therefore no man can reach the level of sonship and Godhood that Christ possesses.
No one has ever seen God, but God the One and Only, who is at the Father’s side, has made him known. – John 1:18