But in hell and eventually the Lake of Fire, which burns into perpetuity, the constantly burning fire will torment, but not purify. The reason it cannot purify the souls housed there is due to the fact that those individuals will continue sinning in eternity. The unrighteous person does not stop sinning once this physical life is over. They will continue sinning even after they arrive to eternity. The fires of the Lake of Fire/hell, will never be able to refine or purify those sinners there because of their continued sinning throughout all eternity.