Isaiah reminds us to trust in God. In his day, relying on horses was common military wisdom (Isaiah 31:1). In our day, we can rely on all kinds of things before we turn to God. When Sennacherib, king of Assyria, threatened Jerusalem and insulted God, Hezekiah wisely prayed to God instead of trusting in horses, chariots and making alliances with foreign governments. God wiped out 185,000 Assyrians all by Himself sending the great world power home in defeat (Isaiah 37). Sennacherib learned God was different than all the gods of wood and stone he had defeated in other lands.