Maamar "Ashrei Tivchar Usekarav" 5716 (1955), by the Lubavitcher Rebbe
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This Chabad Chassidic discourse, Ashrei Tivchar Utekarav, was delivered by the Lubavitcher Rebbe in his office in Brooklyn at a "vach nacht," to Rabbi Ephraim Eliezer Yoles, chief Rabbi of Philadelphia, on the "vach nacht," the evening before the Bris of his grsndson, 16 Cheshvan 5716 (1955). It explores the three souls within each Jew, his or her four levels of consciousness, and the parallel to the four worlds.