כִּ֤י כַבֶּ֙גֶד֙ יֹאכְלֵ֣ם עָ֔שׁ וְכַצֶּ֖מֶר יֹאכְלֵ֣ם סָ֑ס וְצִדְקָתִי֙ לְעוֹלָ֣ם תִּֽהְיֶ֔ה וִישׁוּעָתִ֖י לְד֥וֹר דּוֹרִֽים׃ (ס)
For the moth shall eat them up like a garment, And the worm shall eat them like wool; But My favour shall be for ever, And My salvation unto all generations.
Read Jewish philosophy on Isaiah 51:8: Rambam's Guide for the Perplexed, Saadia Gaon, and classical Jewish philosophical sources, free online.