Image - a family celebrates shabbat
“According to an ancient legend, the light created at the very beginning of creation was not the same as the light emitted by the sun, the moon, and the stars. The light of the first day was of a sort that would have enabled [humanity] to see the world at a glance from one end to the other. Since [humanity] was unworthy to enjoy the blessing of such light, God concealed it; but in the world to come it will appear to the pious in all its pristine glory. Something of that light rests upon saints and [people] of righteous deeds on the seventh day, and that light is called the additional soul.”
Rabbi Aaron Samuel ben Moses Shalom of Kremnitz, quoted in Abraham Joshua Heschel, The Sabbath (New York: Farrar, Straus & Giroux, 2005), 88.