|Matthew Henry's Concise Commentary|
9:41-50 It is repeatedly said of the wicked, Their worm dieth not, as well as, The fire is never quenched. Doubtless, remorse of conscience and keen self-reflection are this never-dying worm. Surely it is beyond compare better to undergo all possible pain, hardship, and self-denial here, and to be happy for ever hereafter, than to enjoy all kinds of worldly pleasure for a season, and to be miserable for ever. Like the sacrifices, we must be salted with salt; our corrupt affections must be subdued and mortified by the Holy Spirit. Those that have the salt of grace, must show they have a living principle of grace in their hearts, which works out corrupt dispositions in the soul that would offend God, or our own consciences.
Gill's Exposition of the Entire Bible
Where their worm dieth not, and the fire is not quenched. The Persic version renders it, "because from thence there can be no deliverance": which is rather an interpretation of these figurative expressions, and is a good one; since they design the eternity of hell torments, as well as point at the anguish and misery of them.
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