In the subsequent 16th-century transcendent Kabbalistic scheme of Isaac Luria, the sefirot are usually listed by omitting Keter and including Da'at (the conscious manifestation of the superconscious Keter. This difference of opinion reflects an earlier Medieval debate regarding whether Keter is the first sefirah, or the Ohr Ein Sof (Infinite light) itself. Luria includes Keter in the list only in relation to the inner light of the sefirot.