Isaiah speaks into Judah’s darkness with a breathtaking promise: God Himself will send a messenger carrying good news of happiness, peace, and salvation. Joy does not rise from within us—it comes to us from God. Judah’s return from exile under Cyrus was the immediate fulfillment, but the ultimate fulfillment came when Jesus arrived bringing good news of great joy for all people. Because of Christ’s redeeming work—purchased not with money, but with His own blood—joy is both certain and accessible to every believer. Our task now is to be the “beautiful feet” who carry this joy to others, just as the shepherds once carried the first announcement of the gospel. Joy has come, joy is coming again, and joy walks into the world on the feet of God’s people.