Light Up the Darkness

In the "olden days," there were no electric street lights. There were kerosene lanterns on every corner whose light shined forth and made going through the streets less threatening. Lamplighters trudged from lamp to lamp with a torch, kindling its flame.Even in the cold and the dark, these lone figures would make their way through the night, leaving a path of light behind them.
We are all lamplighters, charged with the mission of illuminating the world with the light of the Torah and its mitzvos. While this theme is always relevant, at certain times its importance resonates more forcefully than others.
Chanuka is one of those times. As we put our menoras near the doors or windows of our homes with the intent that they shine light into the darkness, we convey a message to the world: "Darkness is temporary. With a little bit of light it can be banished."
The Previous Lubavitcher Rebbe would tell his chasidim, "We must listen carefully to what the Chanuka candles are saying." For the light of the Chanuka candles points us toward many important goals.
Firstly, the Chanuka lights should be kindled after sunset and must burn into the night.
The Chanuka candles teach us not to accept darkness as reality, but instead to kindle light. Moreover, we place the candles at our doorways or in our windows, indicating that we should not remain content with lighting up our own homes. Instead, we must reach out and spread light as far as we possibly can, lighting up the public domain.
Going further: On each night of Chanuka, we add to the number of candles lit on the previous night. Implied is that we can't sit still and rest on our laurels. Instead, we must increase our endeavors every day to spread light throughout the world. Though we illuminated our environment on the previous night, we cannot remain content, but instead must strive to make a further and greater contribution.

--------------------------------------------------------------------------------

Chanuka is celebrated for eight days, a number that our Sages associate with the era of the Redemption. What is unique about eight? The natural order is structured in sets of seven: there are seven days in a week; seven years in the agricultural cycle observed in the Land of Israel. Eight represents a step above that cycle. In the motif of "eight," the transcendent oneness of G-d that surpasses nature's set of seven becomes revealed.
Though connected with oneness, eight is not one. The idea is not that infinity will be revealed in a manner that obscures entirely the material framework in which we presently live. Instead, 8 is 7+1, i.e., His oneness will permeate seven, the set of nature. We will appreciate how the truth of our own existence is G-dliness. The transcendent will be enclothed within the framework of our worldly sphere.
This message is illuminated by the light of the Chanuka candles. They recall the miraculous burning of the menora in the Temple and imbue us with the awareness that the Menora will soon be kindled again, spreading G-dly light openly throughout the world.
From Keeping In Touch by Rabbi Eliyahu Touger, published by Sichos In English