He touched my mouth with it and said,
“Behold, this has touched your lips,
and your iniquity is taken away
and your sin forgiven.” Bible other translations

”your sin forgiven.” The coal came from the altar of sacrifice. The wages of sin is death (Rom. 6:23), but God has always been merciful and allowed for a substitutionary sacrifice to atone for people’s sin, ultimately waiting for the sacrifice of Jesus Christ, whose sacrifice can fully atone for human sin. That Isaiah’s sin was forgiven after he was touched with a coal from the altar of sacrifice points to the necessity of having our sin forgiven via sacrifice and points to the necessity of the sacrifice of Christ.

Commentary for: Isaiah 6:7