Tazria: Chapter 14

"Do not gaze upon me, because I am black"


Rabbi Yehuda compares the title verse to the moon, that cannot be gazed upon because it is in darkness when in exile. When the sun shines it does so with six lights, or Sfirot, and when the sun is gone those six lights are gone. Yisrael was exiled because of punishment for sins, and was sentenced to keep the vineyards of other nations rather than keeping the vineyard of Yisrael itself.