קבלה אויף בראשית 27:41

And with these words we can understand what we say at the end of our tefillah “My God, guard my tongue from evil and my lips from speaking deceit. To those who curse me let my soul be silent and may my soul be like dust to all”. And on the surface it would have been enough to say “let me be silent”, why add the part about the soul? And also the prayer repeats “my soul be like dust”! Rather, the intention is to make us learn that lowliness is impressed in the nature of the soul, so the soul is silent, since it is already possible just to be silent and not return insults, but hatred can be guarded inside one’s heart, as we read “and Esav hated Yaakov, and Esav said in his heart ‘the days of my father’s funeral etc” (Gen. 27:41). And the Text says “a haughty hearted person is an abomination to God” (Prov. 16:5) – even if the haughtiness is only in a person’s heart and does not come out through one’s mouth, and this is why we say “may my soul be silent”, that the soul itself should be silent. And this is the “people who lay My Torah to heart”, that the Yehudah HeHasid z”l explained , and so we explained in the Gate of Love that all haughtiness and anger come only from the side of dross, because the soul, from its nature, is humble in front of God and in front of everything, as Moshe our teacher PBUH said “and we, what [are we]? (Ex. 16:7)