“Then said I, ‘Woe is me! For I am undone; because I am a man of unclean lips, and I dwell in the midst of a people of unclean lips: for mine eyes have seen the King, the LORD of hosts.’ Then flew one of the seraphims unto me, having a live coal in his hand, which he had taken with the tongs from off the altar: and he laid it upon my mouth, and said, ‘Lo, this hath touched thy lips; and thine iniquity is taken away, and thy sin purged.’ Also I heard the voice of the Lord, saying, ‘Whom shall I send, and who will go for us?’ Then said I, ‘Here am I; send me.'” Isaiah 6:5-8 (KJV)