It was a custom known as "battle by champion." Two opposing armies would each send out their best warrior to fight each other. That is what we see this week. The demons send their champion: Satan. Humanity's best warrior, Jesus Christ, steps forward to meet him. In this fight he does not use his divine power. He uses the same weapon we have, God's Word. Because Christ fought the battle against Satan as one of us, he won that battle for all of us. Jesus is our perfect substitute. Even as the devil still seethes in rage against us, we can face him and his temptations unafraid, confident that our champion has already won the victory.