לֹ֤א יָֽדְע֨וּ ׀ וְלֹ֥א יָבִ֗ינוּ בַּחֲשֵׁכָ֥ה יִתְהַלָּ֑כוּ יִ֝מּ֗וֹטוּ כָּל־מ֥וֹסְדֵי אָֽרֶץ׃
They know not, neither do they understand; they go about in darkness; all the foundations of the earth are moved.
Read kabbalistic (mystical) interpretation of Psalms 82:5: and classical mystical sources.