One who contributes from his wealth for the purpose of writing or publishing a sefer of a Tzaddik –
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.
—The Rebbe, Igrot Kodesh, vol 2
Transforming the Inner Self
by Rabbi Schneur Zalman of Liadi
This discourse presents a modern-day perspective on the Biblical command to offer animal sacrifices. Rabbi Schneur Zalman teaches that each of us possesses certain character traits that can be seen as "animalistic," or materialistic, in nature, which can lead a person toward material indulgence.
Our mission, then, is to "sacrifice" and transform the animal within, through meditating upon the greatness of G-d. This ultimately alters the very composition of one`s materialistic traits, so that they too may gain an appreciation of the spiritual, and develop a love for G-d.