Ever run across those verses with God kind of loudly declaring “I am God, acknowledge that” and so forth? You find them in Isaiah (43:11; 45:5), Ezekiel (12:15; 2044), and places like that. I remember when I first read them in my studies, I was kind of put off. I didn’t get it at first. God seemed awfully narcissistic and insecure to be going on about himself like that, kind of like the awkward guy who refers to himself in third person. (“Derek doesn’t like mayonnaise. Derek is the greatest.”)

Well, later on, I read a bit more, understood the context, and began to deeply love these declarations of God’s sovereign uniqueness. He truly is the LORD, and compared to him there is no other. I love the bold, forthright assertion of his His kingly ‘colossal self-regard’, to use Walter Brueggeman’s phrase. What’s really amazing about it is that there’s actually something very humble about God coming to us and declaring himself to a rebellious people. Given our willful blindness to the truth, why should a great and mighty Creator bother with us at all? Yet in these statements God invites us to relationship with a true and living God, not the false little idols we’ve made for ourselves.

Athanasius paints helpful picture for us when it comes to understanding these passages:

And this account of the meaning of such passages is satisfactory; for since those who are devoted to gods falsely so called, revolt from the True God, therefore God, being good and careful for mankind, recalling the wanderers, says, ‘I am Only God,’ and ‘I Am,’ and ‘Besides Me there is no God,’ and the like; that He may condemn things which are not, and may convert all men to Himself. And as, supposing in the daytime when the sun was shining, a man were rudely to paint a piece of wood, which had not even the appearance of light, and call that image the cause of light, and if the sun with regard to it were to say, ‘I alone am the light of the day, and there is no other light of the day but I,’ he would say this, with regard, not to his own radiance, but to the error arising from the wooden image and the dissimilitude of that vain representation; so it is with ‘I am,’ and ‘I am Only God,’ and ‘There is none other besides Me,’ viz. that He may make men renounce falsely called gods, and that they may recognise Him the true God instead…

Discourses Against the Arians 3.8

Our idols are like finger-paintings of the sun posted in our windows. There’s no comparison to the real thing. In his mercy, God reveals himself to us that we might turn from these darkening idols to the true light of God.

Now, Athanasius is dealing with this text in his disputes with the Arians.  They were contending that in light of these, it’s blasphemy to say that the Son is co-eternal with the Father. Athanasius goes on to give the passage a Christological shape in order to expose their confusions:

Indeed when God said this, He said it through His own Word…For the Word of the Lord came to the Prophet, and this was what was heard; nor is there a thing which God says or does, but He says and does it in the Word. Not then with reference to Him is this said, O Christ’s enemies, but to things foreign to Him and not from Him. For according to the aforesaid illustration, if the sun had spoken those words, he would have been setting right the error and have so spoken, not as having his radiance without him, but in the radiance shewing his own light. Therefore not for the denial of the Son, nor with reference to Him, are such passages, but to the overthrow of falsehood.

-ibid.

Just as its ridiculous to think that the sun could shine a light without its own radiance, Athanasius says it’s a mistake to think of God saying “I am the LORD, apart from me there is no other” without His Word. The Son is not some thing external to the Father, but is of his own essence. From all of eternity God has been the Father of the Son. Which is why, when he wants to make himself  known, God declares himself to us through Jesus Christ, the Son. The Son is how God calls us away from the worship of false gods of our own making, speaking light into all of our darknesses.

Soli Deo Gloria