Here then is the kicker. The devil thought that he controlled the whole world. He asked Jesus to worship him (σὺ οὖν ἐὰν προσκυνήσῃς ἐνώπιον ἐμοῦ). If Jesus did that, then the devil would give Jesus all these kingdoms (ἔσται σοῦ πᾶσα). This is much the same as Matthew, chapter 4:9. For many Christians, this seemed like a stupid temptation, since God, the Father and his Son, already controlled the world. Why would Jesus worship the devil? That made no sense.
This 3rd and final temptation was the 2nd temptation in Luke, chapter 4:5-8. The wording is the same, indicating a shared common source, perhaps Q. This time, the devil took Jesus to an exceeding high mountain (Πάλιν παραλαμβάνει αὐτὸν ὁ διάβολος εἰς ὄρος ὑψηλὸν λίαν). He then showed him all the great kingdoms of the world with all their splendor and glory (καὶ δείκνυσιν αὐτῷ πάσας τὰς βασιλείας τοῦ κόσμου καὶ τὴν δόξαν αὐτῶν). Then he asked Jesus to worship him. If Jesus fell down and worshipped him (ἐὰν πεσὼν προσκυνήσῃς μοι), the devil would then give all these kingdoms with their glory to him (καὶ εἶπεν αὐτῷ Ταῦτά σοι πάντα δώσω). Somehow this devil thought that he was in control of all the nations in the world. Perhaps the early followers of Jesus thought that the world outside Jerusalem was under the power of the devil. For many Christians, this seemed like a stupid temptation since God, the Father and his Son, already controlled the world.