Tonight is the seventh light of Chanukah, which is also Rosh Chodesh: the new moon in tonight’s sky heralds the start of the new month of Tevet.

(To be technical about it, this month has a two-day Rosh Chodesh, which happens occasionally; the new moon is on the second night, Monday night. Here’s more.) 

I think this night holds one of the secrets of the Chanukah.

Chanukah, ritually speaking, is very simple. For eight nights, starting on the 25th of Kislev, we light menorahs and place them so they can be seen by passers-by. We begin with one light and we increase incrementally until the final night, when the menorah is fully lit with eight flames.

This is the key symbol of Chanukah. Chanukah always falls during these eight days around the new moon that is most closely situated to the winter solstice—that is, days with the least amount of daylight (in the northern hemisphere) and most darkness: the sun is at its most distant point from earth’s axis and the moon is at its most obscured.

During that darkest time of the year—that’s precisely when we have our festival of lighting lights. And light, of course, is a pregnant symbol. It can mean justice, love, faith, peace, hope, wisdom (“enlightenment”), hidden mystical Truth. Rabbi Schneur Zalman of Lyady (1745-1812) taught that while other festivals are celebrated with symbols that are inherently physical (matzah, sukkah, shofar, etc.), only Chanukah is celebrated with a symbol that is inherently spiritual: light.  

And Beit Hillel in the Talmud famously taught that in matters of holiness, our task is to always increase light, and never to decrease it (Shabbat 21b). 

Yet here’s the thing: during the first six nights of Chanukah, we stubbornly light the menorah—even while the world gets darker and darker. We add flames while the light of the moon keeps diminishing.

But tonight there’s a change. Tonight the moon starts to emerge and wax larger. It’s as if to say that our efforts have started to pay off:  The world is starting to follow our persistent lead, inclining towards light rather than darkness. 

Look, the world these days can seem pretty dark—no matter what darkness connotes for you. Things seem hopeless? Nations seem to be careening towards corruption and war instead of integrity and peace? People who said they care about you seem heartless? Feels like greed and materialism are winning out? I know the feeling—I’ve been there.

But the aspiration of Chanukah is that hope wins out in the long term. Keep using a spark to light more lights—and the world slowly, inevitably, will start to incline towards the light.