This seminal work of Chabad Chasidic philosophy is considered to be the "last will and testament" of the sixth Lubavitcher Rebbe, Rabbi Yosef Yitzchak Schneersohn. The discourse was released for the 10th of Shevat in the year 5710 (1950); on that day Rabbi Yosef Yitzchak passed away. Chasidim customarily study Basi LeGani each year in honor of the yahrzeit, and each year his successor, the Rebbe, Rabbi Menachem M. Schneerson, explained another of its chapters in depth. The Rebbe's exposition of Basi LeGani, the first Chasidic discourse he spoke upon assuming the mantle of leadership in 5711 (1951), was also a declaration of his own mission and goals. This widely acclaimed English edition will enable many more Jews to participate in the study of this important work.