The Lubavitcher Rebbe's discourse Kol Yisrael begins with the Mishnah that is recited before the study of Pirkei Avos stating: "All Israel has a portion in the world to come." In this lesson, covering chapters 1-2 of the maamar, we question why even those souls that reside in the highest levels of heaven will need to come back down to the physical world in order to experience resurrection after the coming of Moshiach.