One who contributes from his wealth for the purpose of writing or publishing a sefer of a Tzaddik โ
Behold, at any given time, and in any corner of the world, that a person studies from this sefer, the Tzaddik [on high] evokes merit on behalf of the donor through whom the sefer was disseminated.
โThe Rebbe, Igrot Kodesh, vol 2
Penned by Rabbi Yosef Yitzchak Schneersohn, sixth Lubavitcher Rebbe, this monograph describes the process with which Rabbi Schneur Zalman imparted to his earliest followers the basic tenets of his newly developed Chabad philosophy, and tells of the challenges faced by Rabbi Schneur Zalman from two main camps that opposed the growing Chasidic movement: the Mitnagdim and the rising Haskalah (Enlightenment) movement.