R. Shneur Zalman was one of the great Jewish personalities of his age, as great a scholar in talmudic studies as in Kabbalah. He had a wide knowledge of science and mathematics, and his powers as a systematizer were enhanced by a fine style. Yet he was also a mystic, and deeply emotional; he composed hasidic melodies and was a charismatic leader. All these qualities blended in a strangely harmonious way. His work is masterly on every subject, an almost unique combination of mysticism and common sense. His other important works are Likkutei Torah (Zhitomir, 1848), Torah Or (1836), and Ma'amarei Admor ha-Zaken (1958–60).