אֶת־יְהוָ֥ה צְבָא֖וֹת אֹת֣וֹ תַקְדִּ֑ישׁוּ וְה֥וּא מוֹרַאֲכֶ֖ם וְה֥וּא מַֽעֲרִֽצְכֶֽם׃
The LORD of hosts, Him shall ye sanctify; and let Him be your fear, and let Him be your dread.
Read kabbalistic (mystical) interpretation of Isaiah 8:13: and classical mystical sources.