Here is a question I used to have in my mind as I would listen to folks preach on Jesus' teaching from the Gospels concerning "the worm that doesn't die and the unquenchable fire" (maybe you have wondered the same thing):
Why do we teach that an undying worm represents a human soul being tormented forever in hell? I mean, really, where does that come from?
We know what Jesus said: "If your eye causes you to stumble, throw it out; it is better for you to enter the kingdom of God with one eye, than, having two eyes, to be cast into Gehenna, where their worm does not die, and the fire is not quenched. For everyone will be salted with fire." (Mark 9:47-49)
"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."
"Do not fear those who kill the body but are unable to kill the soul; but rather fear Him who is able to destroy both soul and body in Gehenna."
"For, behold, whose who are far from You will perish; You have destroyed all those who are unfaithful to You."