Today's sermon emphasizes that true faith should impact every part of our lives. It contrasts the destructive nature of worldly wisdom, characterized by selfish ambition and bitter envy, with the pure and peace-loving wisdom from heaven. Focusing on James 4:1-10, the sermon explains how selfishness causes internal, external, and spiritual conflict, described as spiritual adultery against God. James calls for submission to God, which brings internal nearness, external peace, and spiritual humility.