it speaks of being cast into Gehenna. Gehenna was a fire pit outside Jerusalemn where certain kinds of garbage was burned. Better to cut off your hand(repent of something I am attached to that is coming between you aand God) or pluck out your eye(repent of something I am lusting after or want so much it comes between me and God) and enter heaven maimed(having suffered loss) than to enter Gehenna (the corrective process of God, such as the Lake of Fire) whole(holding onto some darkness that must be burned off in the light/firre of God).
I personally believe there will be both correction and punishment for the wicked, many stripes,or few- depending on their deeds. I also believe it will be a difficult, unpleasant experience- or Jesus would not have used such an extreme example.
"Where there worm dies not and the fire is not quenched", imo, speaks of the condition that develops from continual persistence in wickedness, lust and rebellion, and the hardness/darkness it creates this in the soul of man, and the consequences that can come of it both in this life and the world to come. "It is a terrible thing to fall into the hands of the living God".....
I personally believe that those verses teach that "Everyone will be salted with fire" (Mk 9:49) and that it is better to let the fire work in this life in fellowship with Christ, the Father and one another than to endure the correction in the next world.
41 Truly I tell you, anyone who gives you a cup of water in my name because you belong to the Messiah will certainly not lose their reward.
42 and whoever may cause to stumble one of the little ones believing in me, better is it for him if a millstone is hanged about his neck, and he hath been cast into the sea.
43 `And if thy hand may cause thee to stumble, cut it off; it is better for thee maimed to enter into the life, than having the two hands, to go away to the gehenna, to the fire -- the unquenchable --
44 where there worm is not dying, and the fire is not being quenched.
45 `And if thy foot may cause thee to stumble, cut it off; it is better for thee to enter into the life lame, than having the two feet to be cast to the gehenna, to the fire -- the unquenchable --
46 where there worm is not dying, and the fire is not being quenched.
47 And if thine eye may cause thee to stumble, cast it out; it is better for thee one-eyed to enter into the reign of God, than having two eyes, to be cast to the gehenna of the fire --
48 where their worm is not dying, and the fire is not being quenched;
49 for every one with fire shall be salted, and every sacrifice with salt shall be salted.
50 The salt [is] good, but if the salt may become saltless, in what will ye season [it]? Have in yourselves salt, and have peace in one another.'
Verse 50 is the point, or resolution, of the previous verses- it is not teachingn the eternal torment of the wicked.
Clearly the salt is fire, and light is fire to darkness. We are to "walk in the light" as He is in the light, as children of the light- salting one another in the fellowship of the light(encourage one another to love and good works). In so doing we insure that we will not have to endure a more intense form of correction in the world/age to come(olam/aion).
The fire is unquenchable- you can't put it out- it is the light of God(our God is a consuming fire) and it never goes out, and it will consume the dross until there is no more, until we are as gold tried in the fire 7 times. If we yield to that process(the purifying of your faith is more precious than gold- peter) we are rewarded with great grace and fellowship together in Christ. If not(in varying degree) we experience the fire from a different abode(if anyone abide not in Me he will be cut off as a branch, gathered by men and thrown into the fire John 15) and it can be extremely unpleasant. Better to yield to the Holy Spirit, amen?