24 “Then they will go forth and look On the corpses of the men Who have transgressed against Me. For their worm will not die And their fire will not be quenched; And they will be an abhorrence to all mankind.” Isaiah 66:24 (NASB)
Those who espouse Christian Universalism as the true model of God’s Redemption plan for man, must ignore most of Sacred Scripture as well as misinterpret their so-called “proof texts” in order to make their suppositions. The Bible makes it very clear that those Universalist teachings are heretical.
Carefully read the passage I placed at the top of this post, Isaiah 66:24. What does it tell us? Who is it whose worm does not die nor is their fire quenched? It is those who have rebelled against God. This would be all those who have not believed the Gospel and repented. They have remained in their sins because they have clung to their sins and rejected God as their Sovereign Lord. Our Lord Jesus quoted this passage in Mark 9.