Spiritual Knowledge occupies a pivotal and contested position across the depth-psychology corpus, functioning simultaneously as an epistemological category, a soteriological goal, and a marker of inner transformation. The corpus distributes its treatments across three broad registers. In the Aurobindonian tradition, spiritual knowledge is understood as a tertiary unfolding of the Spirit’s self-regard — a movement from identity to separative knowing — whereby successive planes of illumined consciousness (the Illumined Mind, the Intuitive, the Overmind) gradually replace the ordinary thought-based epistemology with a vision-knowledge rooted in self-luminous identity. In the Philokalic tradition, particularly through Maximos the Confessor, Nikitas Stithatos, and the anchorites of the fourth volume, spiritual knowledge is inseparable from dispassion: it is a gift of grace, received through prayer, stillness, and ascetic purification, and it holds no validity unless embodied in virtuous action. The tension between these streams is decisive — Aurobindo places spiritual knowledge within an evolutionary ontology of consciousness, while the Philokalia situates it within an apophatic and ecclesial framework of grace. A third register, represented by Zimmer and Easwaran, draws on Indian scripture (Bhagavad Gita, Upanishads) to contrast para (transformative spiritual wisdom) against apara (mere intellectual knowledge). Across all registers, the concordance is emphatic: spiritual knowledge is not propositional but experiential, not acquired by intellect alone but realized through the transformation of the whole being.