One of the most important and oft-quoted of the classic chassidic texts. It discusses mystical aspects of the Sabbath and festivals and is arranged according to the months of the year. The author writes that the title of the work is based on the verse "Of the Issacharites, men who knew how to interpret the signs of the times" (I Chronicles 12:33), an allusion to the book's explanation of the Jewish festivals. According to a tradition passed down within the author's family, an additional reason why it was so named is because the author was informed by his teacher (Yaakov Yitzchak Horowitz, the seer of Lublin) that he was a descendant of the tribe of Issachar.