What is the reason we become intoxicated with joy and drink on Purim, and why will this holiday survive for all time when even Biblical holidays will cease to be? In this classic maamar from Torah Or, Chayav Inash Livsumei—here adapted into clearly explained English for the first time anywhere, and presented in a flowing, readable style—the Alter Rebbe answers these questions by exploring the Jewish nation’s deep bond of commitment and bittul to G-d, reaffirmed on Purim. This is the famous discourse referred to by the Tzemach Tzedek as simply “the Purim discourse,” because it captures the essential theme of Purim.