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
Victory of Light
by Rabbi Menachem M. Schneerson the Lubavitcher Rebbe
Victory of Light is an exposition on the deeper significance of Chanukah, viewed through the lens of Chabad-Chasidism.
Here, the Rebbe explains that the war of the Greeks was a spiritual one, aimed at eradicating the notion that Torah and mitzvot are holy, G-d given and Divine. The Hellenistic Greeks wished to secularize Judaism, to turn it from a supra-rational "faith" into a very rational system of philosophy and moral conduct. And in this sense the Greek Empire is very much alive: there still exist forces- from both without and within -that wish us to forget that Judaism is G-dly.
The victory of the Jews over the Greeks represents the victory of the supra-rational over the rational, the G-dly over the secular. We therefore immortalize Chanukah by lighting fiery lamps against the darkness of night, to celebrate the Victory of Light.