Another [explanation]: "For the Conductor..." For He who [it is as if He] leaps like a deer, as He gives light to the world in [its] dark hour. And when does He give light at night? Even though it is night, it [already] has its light - [that of] the moon, stars, and constellations? When is it [fully] dark? At daybreak [when] the moon sets and the stars go in and the constellations go on their way, there is no darkness greater than at that hour, and in that hour, the holy One, blessed be He, raises the dawn from the darkness and brings light to the world. And so He says (Genesis 15:12) "And behold a great dark dread was falling upon him" - "dark" refers to Medea in the days of Esther.