For a mitzvah is a candle and Torah is light. (Proverbs 6:23)
Every mitzvah shines its particular light into our world. And there will come a time when you will see that light with your eyes.
Except the candles that are lit for Shabbat before sunset. They shine a light you can see right now.
It may seem an ordinary light, just another flame. But there is nothing ordinary about...