What does Isaiah 10:15 mean?
Once the Lord is done using the Assyrian war machine to judge His people Israel, He will turn and punish the arrogant speech of king of Assyria (Isaiah 10:12). Isaiah quoted some of that arrogant speech (Isaiah 10:13–14). Official government inscriptions from kings of this era have been found with similar self-declarations of personal greatness. Isaiah emphasizes once again how far from the truth the perspective of these self-glorifying kings is. Instead of being the engineers of their own greatness, they are merely tools in the hand of the living God.The prophet mocks these kings by asking if the axe ever brags as it is wielded. Or if a saw declares its own glory. Of course not. In the same way, the rod is not using the person who picks it up to accomplish its agenda. A stick has no will. These objects do not make use of the person who brandish it as a tool. How foolish of the king of Assyria, or of any of us, to believe himself to be the ultimate builder. Rather, the Assyrian king is just a tool in the hands of a skilled craftsman: the Lord God of Israel.