In one of his epistles the Baal Shem Tov writes that when his soul ascended to heaven in the year 5507, he approached the palace of Messiah and inquired of him, Eimosai Ko'ose Mar, "When will the Messiah come?" The answer of the Messiah was: "I will come only when your (The Baal Shem Tov's) wells of Torah will overflow to the outside." Thus we are taught that the propagation of the Chassidic teachings and customs is a prerequisite and necessary prelude to the coming of the Messiah. The Lubavitcher Chassidim have adapted a well-known melody to perpetuate the inquiry of the Baal Shem Tov and the reply of the Messiah. This melody is sung frequently in great ecstasy at Chassidic gatherings.