Soul Knowledge occupies a privileged and contested position across the depth-psychological corpus, spanning Aristotelian ontology, Neoplatonic epistemology, Yogic gnoseology, Hesychast spirituality, and post-Jungian archetypal psychology. Aristotle opens the inquiry by placing the study of the soul at the apex of scientific endeavor, insisting that such knowledge, though the most honorable, is also among the most difficult to attain. Plato, through the Socratic dialogues, casts knowledge as the very ‘food of the soul,’ while the Meno’s doctrine of recollection reframes soul-knowledge as anamnesis rather than acquisition. Aurobindo radicalizes the stakes: the soul imprisoned by ego-consciousness operates under a ‘falsifying knowledge,’ and liberation requires ascending to the vijñānamaya puruṣa, the knowledge-soul proper. For Giegerich, the soul does not merely desire self-knowledge as a pious aspiration—it demands the ‘naked truth,’ and any psychology that substitutes introspective self-observation for genuine soul-cognition commits a fundamental betrayal. The Philokalia tradition distinguishes natural from supernatural knowledge, insisting that an unillumined soul cannot ascend to divine light unaided. Hillman, by contrast, locates soul-knowledge in the imaginal—in the daimon’s memory of destiny rather than in discursive cognition. These voices converge on one insistence: ordinary ego-knowledge is categorically insufficient, and whatever constitutes genuine soul-knowledge involves a qualitative transformation of the knower.