And this task was said about Elijah the Prophet, because the disclosure of the secrets is always referred to as the disclosure of Elijah, as they have said, “let it rest until Elijah comes,” and also, “the Tishbi will answer the questions and problems.”

For this reason they said that three days (a known intimation) prior to the coming of the Messiah, Elijah would walk upon the hilltops and will blow in a great horn etc. You must understand these intimations, that that the horn is only the issue of 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 in this wisdom will testify to it, that matters of the greatest importance have been spread out like a gown for all to see, which is a true testimony that we are already at the threshold of redemption, and that the voice of the great horn has already been heard, though not in the distance because 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 horn, that it progressively grows.

Baal HaSulam, in his article “Messiah’s Horn,” taken from his book Ohr Bahir (Bright Light).