The prophet’s words end with a mixture of hope and horror. While God is calling his own, and all the nations to himself, he is also warning that “those slain by the LORD shall be many.” The devouring fire and worms cannot be stopped, which is not a sign of “unending judgment” (ESV Study Bible notes), but a sign that the dead bodies will be unable to prevent their destruction. Those who go out and look on the dead bodies of the rebellious will have a sure witness that the LORD’s victory is final. No more rebellion, no more sin.
LORD, thank you for making an ultimate end of sin.
Isaiah 66