Obscurity in the depth-psychology corpus is not mere cognitive difficulty but a structurally necessary condition of psychic, spiritual, and alchemical life. Across the major voices — Jung, von Franz, Hillman, Pascal, McGilchrist, and the Taoist commentators — obscurity appears as something actively preserved, deliberately cultivated, and ontologically significant. Jung’s engagement with alchemy makes this most explicit: alchemical obscurity is both a protective veil over sacred knowledge and a projection of the nigredo, the interior darkness of the psyche. Von Franz and Campbell extend this into the hermeneutic of esoteric transmission: the ‘heavenly seal’ must not be broken, for knowledge made fully transparent loses its transformative charge. Pascal, from a theological register, insists that obscurity is providentially calibrated — enough to humble the elect, enough to blind the reprobate — making it an instrument of divine economy rather than mere epistemic failure. The Taoist I Ching commentary (Liu Yiming) frames obscurity as a condition of spiritual nature corrupted by ‘acquired temperament,’ something to be cleared by interior illumination. McGilchrist and the pre-Socratics (via Heraclitus) treat productive obscurity as the signature of right-hemisphere knowing, the fertile indeterminacy that analytical clarity destroys. Taken together, the corpus consistently argues that obscurity is not an obstacle to psychological depth but its very medium.