Chabad philosophy comprises the teachings of the leaders of Chabad-Lubavitch, a Hasidic movement. Chabad Hasidic philosophy focuses on religious concepts such as God, the soul, and the meaning of the Jewish commandments. Teachings are often drawn from classical Judaic teachings and Jewish mysticism. Classical Judaic writings and Jewish mysticism, especially the Zohar and the Kabbalah of Rabbi Isaac Luria, are frequently cited in Chabad works. These texts are used both as sources for Chabad teachings as well as material requiring interpretation by Chabad authors. While Chabad was founded by Rabbi Shneur Zalman of Liadi, Chabad philosophy is based on the teachings of the Baal Shem Tov (founder of Hasidism) and the Magid of Mezritch (the Baal Shem Tov's successor and Rabbi Shneur Zalman's teacher and mentor). The teachings of Rabbi Shneur Zalman of Liadi, the first Chabad Rebbe, form the basis of Chabad philosophy. Rabbi Shneur Zalman's teachings were greatly expanded upon by succeeding generations of Chabad Rebbes. One of the most central Chabad works is the Tanya by Rabbi Schneur Zalman, and many themes found in the Tanya receive greater treatment in subsequent works. Source: Wikipedia (en)