I. What is a leader?
Simply put, a Jewish leader, the leader of the generation is a neshoma klollis, which means that the majority of his life is dedicated to his non-personal life— he’s life is dedicated to his mekushorim.
When the Frierdiker Rebbe wanted to have a sefer Torah written to greet Moshiach, he wanted all Jews to partake in his endeavor. He said that although he could afford the parchment, the ink and the writing, he wanted every Jew to have the merit of writing Moshiach’s sefer torah.
Not only did he not want to keep the merit to himself— furthermore, he didn’t want to simply have the sefer Torah written and “discharge” every one of their duty, so to speak—the way a neshoma klollis can.
—It brought down(1), that every Jew needs to fulfill all 613 mitzvos; and if the Jew doesn’t fulfill al 613, the neshoma has to come back in a gilgul, reincarnation. This happens over and over again until the neshoma fulfills all 613.
Besides for the mitzvos that are unique to a king (who discharges avery Jew of their obligation by doing his mitzvos himself), we see two ideas here about a neshoma klollis:
Even the mitzvos unique to a king involve the people and are relevant to the people. Every Jew has an obligation to fulfill every mitzvah, it’s just that the king is able to discharge everyone of his set of mitzvos by doing them himself. This is not the case by a regular tzaddik, about whom the gemora says, “Who will give us a replacement for a sage who passes?” whereas a king has a relationship to every Jew (2).
A king is able to fulfill his mitzvos and fulfill them for everyone by virtue of being a neshoam klollis.—
The Frierdiker Rebbe wanted every Jew to have the opportunity to partake of his endeavor. Although certain mitzvos are better fulfilled oneself rather than through shluchim,(agents)—even though one has actually fulfilled the mitzvah by having a shliach (agent), the mitzvah lacks a certain hiddur (beauty), when one doesn’t do it independently. Nevertheless the Frierdiker Rebbe chose to share the merit of his endeavor with anyone who would choose life, so to speak, and help write Moshaich’s sefer Torah.
1. Iggeres HaKodesh, ch. 29
2. Kiddushin 41a. Shulchan Oruch, Orach Chayim ch. 250