מִכַּף־רֶ֤גֶל וְעַד־רֹאשׁ֙ אֵֽין־בּ֣וֹ מְתֹ֔ם פֶּ֥צַע וְחַבּוּרָ֖ה וּמַכָּ֣ה טְרִיָּ֑ה לֹא־זֹ֙רוּ֙ וְלֹ֣א חֻבָּ֔שׁוּ וְלֹ֥א רֻכְּכָ֖ה בַּשָּֽׁמֶן׃
From the sole of the foot even unto the head There is no soundness in it; But wounds, and bruises, and festering sores: They have not been pressed, neither bound up, Neither mollified with oil.
Read Jewish philosophy on Isaiah 1:6: Rambam's Guide for the Perplexed, Saadia Gaon, and classical Jewish philosophical sources, free online.