This new all-pervasive monad encompassed all creation and its original uncreated emanations. The main studies are the ten "Sephiroth" or "Emanations" of the godhead. The analogy of physical light is used as a way of describing metaphysical Divine emanations. Kabbalistic tradition holds that the divine consists of ten "sefirot" (attributes or emanations). Sefirot are energy emanations found on the Kabbalistic Tree of Life. In general, however, 'Amesha Spenta' signifies the six divine emanations of Ahura Mazda. To Greek observers, this signified emanations that caused its malignant influence. Tests of psychic abilities to observe alleged aura emanations have repeatedly been met with failure. These fumaroles produce white emanations and smell of rotten eggs. He authored "Libram of the Great Paravisual Emanations" and "Metaphysics of Mathematics". Zeratul is also on Char, likewise attracted by Kerrigan's psychic emanations and subsequently stranded. LED indicators on computer equipment can be a source of compromising optical emanations. It is known as the World of Emanations, or the World of Causes. The first of these is Barbelo, who is coactor in the emanations that follow. Difficulty in identifying emanations from a set is for a number of reasons.