Isaiah 6:7-9

He touched my mouth with it and said, “Behold, this has touched your lips; and your iniquity is taken away and your sin is forgiven.” Then I heard the voice of the Lord, saying, “Whom shall I send, and who will go for Us?” Then I said, “Here am I. Send me!” He said, “Go, and tell this people: ‘Keep on listening, but do not perceive; Keep on looking, but do not understand.’