Likutei Moharan 10:5/ליקוטי מוהר"ן י׳:ה׳

15. Now, the main solution for eliminating haughtiness—itself considered idolatry, as in (Proverbs 16:5), “God considers an abomination anyone whose heart is haughty”—is to draw close to the tzaddikim. As is brought in the Tikkuney Zohar (#21 p.49a): With a teruah (shofar blast), which is ruach, [belief in an] “other god” disappears.

2And the tzaddik corresponds to ruach, as in (Numbers 27:18), “a man in whom there is <the Lord’s> ruach (spirit).” Through him, the haughty spirit—the “other god”—is humbled; the acheR (other) is transformed into echaD (one). This is because [the tzaddik] is the back-point of the letter dalet (Tikkuney Zohar, p.55b). From him are the four ruchot, as in (Ezekiel 37:9), “Thus says God: Come from the four winds, O spirit.” And this is the connotation of TeRuAh. It is similar to (Psalms 2:9), “You shall TRoAim (break them) with a rod of iron” (Tikkuney Zohar #18, p.36a), because it breaks the haughty spirit/“other god”/atheism.