Once Faithful, Now Fallen - Isaiah 1:21 The sermon explores the tragic decline of a once-faithful city, drawing parallels to the spiritual condition of believers and churches. It emphasizes the danger of complacency and the subtle ways unfaithfulness can creep in, leading to idolatry, moral corruption, and a departure from God's truth. However, the message ultimately offers hope and a call to repentance, reminding listeners that restoration is possible through confession and a renewed commitment to steadfastness in faith, emphasizing the importance of guarding against spiritual compromise and actively pursuing a life of obedience to God's Word.