What does Isaiah 10:12 mean?
The kings of the Assyrians believed in their own might. They built armies into cruel and relentless machines of war. They developed strategies and executed them to wild success. They were conquering the world (Isaiah 10:8–11). According to their own thinking, this was entirely their own power and their own will coming to be.Yet that was not true. Isaiah states that it is the Lord who is executing His own plans and strategies. The Assyrians are nothing but a destructive tool in His hands. One that He will use to bring judgment on His own people in Israel and Judah. Once the Lord has finished that work of judgment on Mount Zion, where the temple stood, and in Jerusalem, He will turn and punish the king of Assyria.
What exactly is the king of Assyria guilty of? If he is fulfilling the Lord's purpose, even without realizing it? Isaiah says that the Lord will punish the king for his arrogance and pride. God hates such arrogance and self-glorification, even among those who do not worship Him as Lord.
Very few people will ever rise to the temporary glory of the kings of Assyria. These ancient rulers inspired dread, hatred, and respect from those they ruled over. Still, the belief that our plans and our successes are our own, instead of merely being elements in the plans of the Lord are common throughout time.