וְחִכִּ֙יתִי֙ לַיהוָ֔ה הַמַּסְתִּ֥יר פָּנָ֖יו מִבֵּ֣ית יַעֲקֹ֑ב וְקִוֵּ֖יתִֽי־לֽוֹ׃
And I will wait for the LORD, that hideth His face from the house of Jacob, and I will look for Him.
Read kabbalistic (mystical) interpretation of Isaiah 8:17: and classical mystical sources.