Then one of the seraphim flew to Isaiah, having in his hand a hot coal that he had taken with the tongs from the altar, the same altar on which a sacrifice of atonement was normally made.
The seraphim touched Isaiah’s lips with the hot stone and said, “Behold, this has touched your lips; your iniquity is taken away, and your sin purged” (6:6). What an awesome gift … the gift of grace! Isaiah’s repentance ushered in God’s powerful presence. There is no doubt that Isaiah was a changed man from that day forward. The word “seraphim” literally means to “set on fire” and this experience set Isaiah on fire for God.