Message from Dori Stern,
There is a concept in Judaism called ma'alin b'kedushah, which means ascending (going up) in holiness. We see this idea reflected in how we are supposed to light the Chanukah candles. We light one candle on the first night, two on the second, and so forth, until we are aglow in the light of nine candles.
Lighting candles in this way is meant to remind us of the meaning of the miracle of Chanukah. It reminds us that the one-day supply of oil continued to burn for eight days. In a wider sense, increasing the candles, one day at a time, is meant to also remind us of the Jewish concept of spirituality -- of ma'alin b'kedushah. We are taught that we should always strive to achieve greater and greater appreciation of the miracles of life, and while doing so we reach for higher and higher levels of spirituality.
The Chanukah candles serve as a reminder for us to not rest at an introductory level of spirituality but to continue with one's spiritual search for one's entire life.