Charles Spurgeon Commentary Isaiah 51:8

"For the moth shall eat them up like a garment, and the worm shall eat them like wool; but my righteousness shall be for ever, and my salvation unto all generations." — Isaiah 51:8 (ASV)

Let them snarl, and let them bite, if they will; they can do no harm to that righteousness which shall be forever, or to that salvation which is from generation to generation.