ק֤וֹל רַעַמְךָ֨ ׀ בַּגַּלְגַּ֗ל הֵאִ֣ירוּ בְרָקִ֣ים תֵּבֵ֑ל רָגְזָ֖ה וַתִּרְעַ֣שׁ הָאָֽרֶץ׃
The voice of Thy thunder was in the whirlwind; The lightnings lighted up the world; The earth trembled and shook.
Read kabbalistic (mystical) interpretation of Psalms 77:19: and classical mystical sources.