Before creation, the Universe was “chaos and void, and darkness over the abyss”. And then G-d created light, which our sages explain was not a physical light, but a spiritual one. The Chofetz Chaim learns from this that we defeat darkness in the world by increasing light; by following G-d’s example, and proclaiming: “Let there be light!” once a week over our Shabbat candles. By lighting Shabbat candles, we bring the light, warmth, heat, love and illumination into our homes and into our lives.
Get the: Let there be love (PDF)