Habakkuk 2:13 Kabbalah

הֲל֣וֹא הִנֵּ֔ה מֵאֵ֖ת יְהוָ֣ה צְבָא֑וֹת וְיִֽיגְע֤וּ עַמִּים֙ בְּדֵי־אֵ֔שׁ וּלְאֻמִּ֖ים בְּדֵי־רִ֥יק יִעָֽפוּ׃

Behold, is it not of the LORD of hosts That the peoples labour for the fire, And the nations weary themselves for vanity?

Read kabbalistic (mystical) interpretation of Habakkuk 2:13: and classical mystical sources.