Wednesday, November 19’s devotional.
Isaiah’s cry, “I’m a man of unclean lips,” pierces with unusual force because it comes from a prophet—someone whose very calling depends on speech. Bongani captured this tension when he said, “In verse five… he’s a man with no message.” Isaiah cannot echo the angels’ proclamation—“Holy, holy, holy is the Lord of Armies; his glory fills the whole earth”—because his lips, the instrument of proclamation, are defiled. His sin has silenced him. The messenger has no message because the messenger is not clean.
Isaiah’s confession reveals the depth of sin’s reach. He does not merely say he is sinful in general; he pinpoints the very faculty God often uses most. Throughout Scripture the tongue stands as a window into the heart. Jesus said, “For the mouth speaks from the overflow of the heart” (Matthew 12:34). James warns that the tongue is “a fire… a world of unrighteousness” (James 3:6). Isaiah feels this truth burn into him as he stands before the Holy One. He cannot proclaim God’s holiness while harbouring impurity within. Bongani explained it simply and painfully: “Sin can defile both the messenger and his message.”
This moment exposes more than Isaiah’s lips—it exposes humanity’s impossibility. Even the angels proclaim God’s holiness freely, but Isaiah cannot. Bongani said, “The angels had a message… but he had no message.” When human sin touches the tongue, witness collapses. When the heart is impure, proclamation loses its power. Isaiah’s silence becomes a confession of need. He requires cleansing before he can speak. Only after the burning coal touches his lips does the word of mission come: “Your iniquity is taken away and your sin is forgiven” (Isaiah 6:7). Cleansing restores calling. Purity precedes proclamation. Holiness enables service.
Let this press deeply into your heart today. What fills your speech? What shapes the words you offer to God, to your family, to your church, to the world around you? The Lord calls His people to reflect His purity in their mouths as well as their hearts. Paul urges believers, “Let no foul language come from your mouth, but only what is good for building up” (Ephesians 4:29). God desires lips touched by grace, tongues surrendered to righteousness, and voices ready to declare His glory without hypocrisy. The same God who cleansed Isaiah stands ready to cleanse you through the finished work of Christ.
Holy God, purify my lips and cleanse my heart. I confess that my words often reveal impurity within me. Touch my mouth with the fire of Your holiness so that my speech may honour You. Remove every distortion, every falsehood, every unclean thing that silences faithful proclamation. Make me a messenger who carries a true message—one shaped by grace, empowered by Your Spirit, and anchored in the gospel. Use my tongue to build, bless, and bear witness to Your glory. Amen.