לֹ֥א תַעֲרֹ֖ץ מִפְּנֵיהֶ֑ם כִּֽי־יְהוָ֤ה אֱלֹהֶ֙יךָ֙ בְּקִרְבֶּ֔ךָ אֵ֥ל גָּד֖וֹל וְנוֹרָֽא׃
Thou shalt not be affrighted at them; for the LORD thy God is in the midst of thee, a God great and awful.
Read kabbalistic (mystical) interpretation of Deuteronomy 7:21: and classical mystical sources.