The notion of God having two forms and ten Sefirot mediating between them is central to the belief system of which mystical tradition?
Sefirot Sefirot Sefirot (, ; "səphîrôṯ"), meaning "emanations", are the 10 attributes/emanations in Kabbalah, through which Ein Sof (The Infinite) reveals Itself and continuously creates both the physical realm and the chain of higher metaphysical realms (Seder hishtalshelus). The term is alternatively transliterated into English as "sephirot/sephiroth", singular "sefirah/sephirah" etc. Alternative configurations of the sefirot are given by different schools in the historical development of Kabbalah, with each articulating different spiritual aspects. The tradition of enumerating 10 is stated in the Sefer Yetzirah, "Ten sefirot of nothingness, ten and not nine, ten and not eleven". As altogether eleven sefirot are listed
Sefer Yetzirah God engraved...," these paths being then explained as the ten "Sefirot" and the twenty-two letters. While the "Sefirot" are expressly designated as "abstracts", it is said of the letters: "Twenty-two letters: God drew them, hewed them, combined them, weighed them, interchanged them, and through them produced the whole creation and everything that is destined to come into being" (ii. 2). The letters are neither independent substances nor yet as mere forms. They seem to be the connecting-link between essence and form. They are designated as the instruments by which the real world, which consists of essence and form, was produced