Bereshit A: Chapter 11
The luminaries of the light and the luminaries of the fire

On the Sabbath, an immense amount of spiritual Light is revealed in the cosmos, while during the week the Light is extremely diminished. The Zohar explains how we can create a continuous connection to the Shabbath through the closing rituals of the Sabbath itself, such as reflecting candle light off the enamel of the finger nails. If we should ever fall into negativity - Heaven Forbid - no matter how deep that descent might be, reading this section can establish a life-line to the Light of The Creator.