Ner Mitzvah V'Torah Or, principles of the Chabad doctrine, by Rebbe Dov Ber Shneuri – the Mitteler Rebbe of Lubavitch. Kopust (Kopys): R. Yisrael Yoffe, prominent disciple of the Baal HaTanya, 1820. First edition.
The book comprises two parts. The first part is entitled Shaar HaEmuna, "regarding the essence of the mitzva of faith, which is the foundation and root of all mitzvot". The chapters in this part discuss the topics of the Exodus from Egypt, the eating of Matzah and the Splitting of the Sea. The second part, named Shaar HaYichud, contains a concise explanation of the kabbalistic notions of Hishtalshelut HaOlamot and Sefirot (to explain the profound concepts in Shaar HaYichud, an entire composition was written by R. Hillel of Paritch, close disciple of the author, entitled Likutei Biurim, Warsaw 1868).
Rebbe Maharash of Lubavitch stated that each of the Mitteler Rebbe's books was intended for a specific type of Chassid, yet "Shaar HaYichud is the key to Chassidut", and it was written for all Chassidim (Rebbe Rayatz, Limud HaChassidut, p. 30).
Signature on p. 2a: "Yechiel [Baruch?] of Medzhybizh[?]". Signature on the leaf of errata following leaf 133: "Chaim Tzvi of [---]".
Incomplete copy. 4, [7], 133, [1]; 55, [1] leaves. Lacking last leaf. 16.5 cm. Bluish paper. Fair-good condition. Stains. Worming, affecting text. Wear. Marginal tears and damage. Old binding, with wear and damage.
Stefansky Chassidut, no. 395.