Isaiah 40:18
Isaiah 40:1818To whom will you liken God? To what image will you compare Him?
Jehovah's Witnesses cite — "To whom can you liken God? With what can you compare him?" — in two ways. First, the Watchtower's Reasoning From the Scriptures (pp. 183-187) uses it to support a blanket prohibition on religious images: since God is incomparable, no visual representation of him is permissible. Second, JWs invoke the verse against the deity of Christ: since no creature can be likened to God, Jesus — as a created being — cannot be God's equal. In both uses the verse functions as a monotheistic boundary marker that, in JW theology, excludes both physical representations and ontological participation in the divine nature.
is a rhetorical challenge against human attempts to reduce God to a manageable image — idols crafted from wood and gold (vv. 19-20). The incomparability of God is affirmed. However, this makes two New Testament realities all the more striking. First, calls Jesus "the image [eikōn] of the invisible God," calls him "the exact representation of his very being," and declares "the Word became flesh" — God chose to make himself visible from above, the reverse of the human-devised images Isaiah condemns from below. Second, in Jesus tells Philip, "Whoever has seen me has seen the Father also." If no creature can be likened to God (), yet Jesus claims that seeing him IS seeing the Father, the only resolution is that Jesus shares the Father's divine nature rather than merely reflecting it. The very incomparability Isaiah asserts makes Jesus' claim uniquely significant — only God can fully reveal God. On the images question, the bronze serpent of and the temple cherubim of demonstrate that the prohibition targets worship of images, not representation as such.