Originally published in Tzvi M. Rabinowicz (ed.), The encyclopedia of Hasidism (1996), pp. 249-52. Although a number of the hasidic masters—the Maggid of Kozienice, Barukh of Kossov, Tzvi Hirsch of Zydaczov, Yitzhak Eizig of Komarno and his son Elazer Tzvi, the tzaddikim of Munkacs, and all the Habad leaders—were expert in the Kabbalah, Hasidism generally places…