God told Ezekiel to remind the prince of Tyrus that he was a man and not a god, and that  he was soon going to be humbled.  (The art depicts a demon, but the verse identifies a man.  The verse may be personifying the nation of Tyrus, rather than speaking to a particular man.  In the prophesy books of the Bible, nations are often portrayed as beasts, so the art is not without foundation.)