Derech Mitzvosecha  Derech Mitzvosecha, also titled Sefer Hamitzvos (), is an interpretive work on the Jewish commandments authored by Rabbi Menachem Mendel Schneersohn (1789–1866), the third Rebbe of the Chabad Hasidic movement. The work is considered a fundamental text of Chabad philosophy. In "Derech Mitzvosecha", Rabbi Menachem Mendel interprets the Jewish commandments ("mitzvos") according to Kabbalistic and Hasidic teachings. Topics include the commandments of belief in God, prayer, love of a fellow Jew, Tzitzit (fringes on four cornered garments) and Tefillin (phylacteries), and many others. The work provides a Hasidic perspective on fundamental Jewish rites and observances. In some cases, Rabbi Menachem Mendel seeks to clarify or reconcile earlier rabbinic interpretations of the commandments, especially where earlier rabbinic authorities disagree on the matter. In this regard, Hasidic interpretations are employed to refine the statements of earlier authorities and/or to clarify or resolve their differences. In "Derech Mitzvosecha" Rabbi Menachem Mendel discusses the commandment to love one's fellow and not to hate him/her and questions the story in the Talmud concerning Hillel the Elder and the convert. Hillel instructed a non-Jew wishing to convert "what to you is hateful do not do to your friend, this is the (root of) the entire Torah, the rest is commentary. Go and learn." For Rabbi Menachem Mendel, the idea of loving one's fellow should only be considered the root of all commandments that relate to human interactions, "between man and his friend" ("bein adam l'chaveiro"), but not to those that are "between man and God" ("bein adam l'makom"). Rabbi Menachem Mendel resolves this question by introducing the Kabbalistic idea that the souls of the Jewish people compose a "single body"; each individual represents a particular limb. Based on this concept, every Jew is obligated to love his or her fellow though the other may have some deficiency, just as the individual often overlooks his or her own faults due to the natural love one has for one's self. When this kind of "self love" is extended to each other person, it achieves a very strong unity of spirit.