The Shofar of the Messiah
"DISSEMINATION OF THE WISDOM OF KABBALAH THE WORLD OVER
And the dissemination of the wisdom in the masses is called "a Shofar." Like the Shofar, whose voice travels a great distance, the echo of the wisdom will spread all over the world, so even the nations will hear and acknowledge that there is Godly wisdom in Israel."
"DISCLOSING KABBALAH TO ALL THE NATIONS IS A PRECONDITION FOR THE COMPLETE REDEMPTION
You must understand these intimations: The issue of the Shofar is only the disclosure of the wisdom of the hidden in great masses, which is a necessary precondition that must be met prior to the complete redemption.
And the books that have already been revealed through me in this wisdom will testify to it; that matters of the greatest importance have been spread out like a gown for all to see. This is a true testimony that we are already at the threshold of redemption, and that the voice of the great Shofar has already been heard, though not in the distance, for it still sounds very softly.
But indeed, any greatness requires prior smallness, and there is no great voice if it is not preceded by a soft sound, for this is the way of the Shofar, that it progressively grows. And who better than I knows that I am not at all worthy of being even a messenger and a scribe for disclosing such secrets, and much less to thoroughly understand them. And why has the Creator done so to me? It is only because the generation is worthy of it, as it is the last generation, which stands at the threshold of complete redemption. And for this reason, it is worthy of beginning to hear the voice of Messiah’s Shofar, which is the revealing of the secrets, as has been explained."
http://www.kabbalah.info/eng/content/view/frame/42664?/eng/content/view/full/42664&main
"The shofar is blown so as to confuse Satan. Rosh Hashanah is Judgment Day, and Satan on that day acts as accuser. Having seduced man to sin, he then returns to accuse him of the very sins which he incited. But when he hears the sounds of the shofar, he becomes so confused that he loses track of the proceedings and is unable to prosecute effectively."
https://www.chabad.org/library/article_cdo/aid/2828501/jewish/Confusing-Satan.htm