In Jewish mystical thought, the descent of generations applies even more because of this metaphysical explanation. Within scholarship it applies to Halachah and Talmudic commentary because of the simple historical explanations. However, within Lurianic mysticism the opposite progressive ascendency still applies. The reason for this is because this 16th century Kabbalistic dimension of Jewish thought is innovated only by the greatest Tzadikim (saintly souls) in history, the rarest of whom are unaffected by descending generational soul levels. A Tzadik in early 19th century Chabad philosophy, as defined by the Tanya (c. 1814), is a truly elevated soul, unaffected by physical limitations. The rarest such Tzadikim in history, who teach new revelations in Kabbalistic thought, are considered apart from general (traditional) Tzadikim. To them is applied in Kabbalah the verse from Psalms, "The [traditional] Tzadik is the foundation of the World". 16th century Lurianic Kabbalah and 18th century Hasidic philosophy make radical statements about this believed supreme level of Tzadik. In the Kabbalistic worldview, their new revelations in Jewish mystical thought advance the conceptual frontiers of Kabbalah from generation to generation. Therefore, while in Halachah (Jewish Law), scholarship ability decreases in each generation, in 16th century Lurianic, 18th century Hasidic, and 19th century Chabad philosophy, mystical thought is said to ascend through history. This ascent applies to Jewish mystical thought, the "Inner Torah" (Nistar-"Concealed") of Kabbalah, rather than the "Revealed Torah" (Nigleh-"Revealed") of Jewish commentaries on the Bible, Midrash, Talmud, Halachah and Medieval Jewish philosophy. The reason for this is because in Nigleh, scholarship involves discovering new and deeper interpretations of previous revealed Biblical and Rabbinic texts. In Lurianic Kabbalah, advance is made by new doctrines and individual revelations that transcend previous descriptions. "Revealed" Nigleh corresponds to the collaborative scholarly ascent "from Below" of human intellect up to God. "Concealed" Nistar corresponds to privately drawing down new revelations of Divine intellect "from Above", down into the human intellect of one individual. This is also a philosophy, as the difference between Nevuah ("Prophecy") and Kabbalah ("Received"), is that Lurianic Kabbalah becomes articulated conceptually in intellectual structures, in which allegedly lays its supremacy over prophecy. Ascending lights, descending vessels in history This paradoxical dialectic is explained more generally in Hasidic thought as part of the divine cosmic plan of Kabbalistic Lights and Vessels. In each subsequent generation, the external levels of creation and this world ("vessels") descend to a lower level. This enables