“the moth will eat them up.” The moth eating up a garment is a picture of destruction. Those who condemn the Messiah will be destroyed.
It is worth noting that this verse is one that portrays destruction for the unsaved sinner, not eternal torment. Garments that are eaten by moths are gone, totally destroyed. This is an accurate picture of the unsaved. They will not “be tormented in hell forever,” they will be thrown into the Lake of Fire and burned up; annihilated. [For more on the annihilation of the unsaved, see Appendix 5, “Annihilation in the Lake of Fire.”