Teshuva and Simcha are the essence of the soul revealed
The fundamental work of the Rebbe Rashab, Rabbi Shalom DovBer of Lubavitch, "a testament to the wide spreading of the Torah of Chassidus" (Rebbe Rayatz) "in which the foundations of Chassidus are explained clearly with the breadth and order for which he is known, but incomparably more than before" (Lubavitcher Rebbe).
