Shefa ("Flow" שפע and its derivative, Hashpoah "Influence" השפעה) is sometimes alternatively used in Kabbalah, a term also used in Medieval Jewish Philosophy to mean Divine influence, while the Kabbalists favour Ohr because its numerical value equals Raz ("mystery").[1] It is one of the two main metaphors in Kabbalah for understanding Divinity, along with the other metaphor of the human soul-body relationship for the Sephirot.[2] The metaphorical description of spiritual Divine creative-flow, using the term for physical "light" perceived with the eye, arises from analogous similarities. These include the intangible physicality of light, the delight it inspires and the illumination it gives, its apparently immediate transmission and constant connection with its source. Light can be veiled ("Tzimtzum"-constrictions in Kabbalah) and reflected ("an ascending light from the Creations" in Kabbalah).