In his vision, Isaiah's guilt was taken away and his sin foegiven after

In his vision, Isaiah's guilt was taken away and his sin forgiven after his mouth was touched with a burning coal. This happened when he saw the Lord sitting on a throne, high and lifted up, and the seraphim flying around Him, proclaiming His holiness. Isaiah then cried out, "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." One of the seraphim then flew to him with a live coal in his hand, which he had taken from the altar with tongs. He touched Isaiah's mouth with the burning coal and said, "Behold, this has touched your lips; your guilt is taken away, and your sin forgiven." This was a symbolic act of purification and consecration, which prepared Isaiah for his prophetic ministry.