Likutei Moharan 18:5/ליקוטי מוהר"ן י״ח:ה׳

15. And in truth, the kings of the gentiles, even though they rule over us, do not have in their dominion the quality of Jewish kingship. Nor have they affected it. For whoever <of the nations> wants to have an affect upon it, finds neither [type of dominion] remaining under his control. In other words, even their rulership over the gentiles is taken from them. This is because the faith which surrounds our kingship causes their wisdom to fall, their kingship being dependant upon this [wisdom], as above.

2This is what is written about the downfall of Egypt (Isaiah 19:13), “The princes of Tzoan have become obtuse.” Because of foolishness—namely, a fall of their wisdom—their kingdom fell.

3And this is what Chananiah, Mishael and Azariah said to Nebuchadnezzar (Vayikra Rabbah 33:6): “You rule over us with regard to taxes, but with regard to supervising us in service [of God] and faith—you and a dog are on equal footing.” In other words, they said that he had not affected the kingship of the Jewish people, which relates to our faith. This is because our faith surrounds the Malkhut and protects it from being affected by a stranger. It causes those who persecute it [the Malkhut] to hate the wise men. That is, provided the power of heresy has not prevailed over faith, in which case he [the gentile ruler] could take our kingship, God forbid, as in, “He threw a flask of vinegar and it fled.”