Within the depth-psychology corpus, Shiite Gnosis occupies a singular position as the living tradition against which Henry Corbin measures all other forms of Islamic esoterism and, by extension, all comparative mystical phenomenology. Corbin treats it not as a historical relic but as an operative structure of initiatic knowledge: the Imam functions as the guarantor of ta’wil, the spiritual hermeneutics that keeps prophetic revelation perpetually open to interior meaning. The identification of the Paraclete with the hidden Twelfth Imam, the equivalence of walayat with the charisma of initiatory authority, and the inseparability of Imamology from the very possibility of esoteric science — these are Corbin’s recurring axes. Crucially, Corbin insists on the methodological impossibility of studying Ismailian Gnosis, Duodeciman Shiism, and the Sufism of Suhrawardi or Ibn Arabi in isolation from one another; they form a single complex whose animating nerve is the intelligentia spiritualis. Karen Armstrong’s treatment of Iranian Shiism adds a complementary, if less technically rigorous, register — stressing how thinkers such as Mulla Sadra integrated Sufi, Shiite, and Greek philosophical currents into a non-exclusive spirituality. The broader corpus (Hoeller, Jonas, King) provides Gnostic-typological background but does not engage Shiite Gnosis directly, leaving Corbin as the uncontested authority on this terrain.