Isaiah 6:6-10

Then one of the seraphim flew to me with a burning coal in his hand, which he had taken from the altar with tongs.

He touched my mouth with it and said, “Behold, this has touched your lips; and your guilt is taken away and atonement is made for your sin.” Isaiah’s Commission

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!”

And He said, “Go, and tell this people: ‘Keep on listening, but do not understand; And keep on looking, but do not gain knowledge.’

“Make the hearts of this people insensitive, Their ears dull, And their eyes blind, So that they will not see with their eyes, Hear with their ears, Understand with their hearts, And return and be healed.”