The book Bné Issarah explains the lessons to be learned from the Hanukkah laws. 

 1. We must not use the light from Hanukkah candles. 

For this reason, every evening we light an extra candle called Chamach. 

Behind this law, they want to teach us by allusion that it is forbidden to use or enjoy the Torah. Indeed, the Hanukkah candles represent the light of Torah. This idea is found in the Michlé book. In chapter 7, it says "Ki ner Mitswa véTorah Or", the good deed is compared to the candle, and the Torah is compared to the light".

 The numerical value of the word Gold (Aleph wav rech) is 207. The miracle of Hanukkah took place at the time of the second temple, 207 before its destruction.

2. You are allowed to use one Hanukkah candle to light another Hanukkah candle (without using a match). 

This law teaches us that a man with a little Torah (wisdom) will have to instruct his neighbor. The message of the Torah cannot be kept, it is transmitted. A man has the opportunity to make the flame in his neighbour shine.

3. It is customary to light an extra candle every day from Hanukkah.

 In the same way, as light increases over the Hanukkah days, the Torah is a vector of vitality. The Torah is based on a 27-letter alphabet. Each letter is composed of one or two letters (Milouy in Hebrew). This milouy is also composed of another milouy...all this to infinity.

 Example: The letter Aleph is written Aleph (plus Lamed, Phé). Then, each of these three letters is filled with their milouy: Alpeh, Lamed, Phé / Laméd Mém Dalét / Phé and Hey ... all this to infinity.

 Each subject of Torah is infinite in its explanations, messages and comments.

(Rav Tsvi Eliméleh Chapira de Dinov)

Translated with www.DeepL.com/Translator (free version)