וְיָדְע֥וּ תֹֽעֵי־ר֖וּחַ בִּינָ֑ה וְרוֹגְנִ֖ים יִלְמְדוּ־לֶֽקַח׃
They also that err in spirit shall come to understanding, And they that murmur shall learn instruction.
Read kabbalistic (mystical) interpretation of Isaiah 29:24: and classical mystical sources.