Isaiah 40:18 asks a question that has no answer: to what can God be compared? The verse means that God is so far beyond anything humans can make, picture, or imagine that no image, object, or comparison can truly represent him. The prophet Isaiah, speaking under God’s inspiration, asks this of the people of Israel, who were tempted to shrink God down to the size of things they could hold in their hands.
To whom then will you liken God? Or what likeness will you compare to him?
Isaiah 40:18 (WEB)
What Isaiah 40:18 Means
The verse opens with a challenge: “To whom then will you liken God?” The word “then” ties the question to what has just been said. The prophet has just described nations as a drop in a bucket and dust on a scale, so the question is really, if the nations are that small, how could anything be the same as the one who holds them? The question is rhetorical. Isaiah is not asking for a suggestion. He is pointing out that there is nothing to suggest.
The second half, “or what likeness will you compare to him?”, pushes the same point further. A “likeness” is an image or copy, something made to look like another thing. Isaiah is saying that God cannot be copied, carved, cast in gold, or matched by any created thing. The verse does not say that God is unknowable, nor that we cannot speak of him at all. Scripture speaks of God in many ways. What the verse rules out is the idea that he can be reduced to a manageable form that we make and control.
The Context of Isaiah 40:18
The book of Isaiah is traditionally attributed to the prophet Isaiah, who ministered in Jerusalem in the eighth century B.C. Chapters 40 through 66 are often read as a new section that speaks to a people who were soon to face exile in Babylon and who needed comfort and a fresh view of God’s power. Many scholars also note that these chapters reflect the period of exile or just after it, though the traditional attribution to Isaiah is retained by many readers.
The verses just before and after set the stage. In verses 15 through 17, the nations are described as nothing before God, a small speck by comparison. In verses 19 and 20, Isaiah turns to idol makers who cast gold and silver images, and to a poor man who chooses a tree that will not rot for an idol he cannot afford to make well. Verse 21 then asks the people whether they have not known or heard what God has always been. Read this way, verse 18 is the hinge: it moves from the greatness of God to the foolishness of making him into something smaller that can be bought and set up.
Key Phrases in Isaiah 40:18
Isaiah 40:25
“To whom then will you liken me? Who is my equal?” says the Holy One.
(WEB)
The verse that follows the question in Isaiah 40:18 picks up the same theme with a direct answer. The Holy One asks to whom he can be compared, and the answer is that no one can. Reading the two together shows how the prophet builds a case, step by step, that God stands alone in his greatness.
Exodus 20:4
“You shall not make for yourselves an idol, nor any image of anything that is in the heavens above, or that is in the earth beneath, or that is in the water under the earth…
(WEB)
This commandment forbids making carved images to bow down to, and it roots the prohibition in God’s own nature. Isaiah’s words in chapter 40 echo this command, showing that the warning against idols runs through the whole of Scripture and is grounded in who God is.
A Short Prayer From Isaiah 40:18
Lord, you are greater than anything I can picture or build in my mind. I confess that I often try to make you smaller, shaping you into a form that fits my expectations and fears. Forgive me for those attempts. Help me to rest in the truth that no image or comparison can hold you, and let that truth steady me when my circumstances feel overwhelming. Amen.
