Non-ordinary consciousness — encompassing altered, psychedelic, holotropic, mystical, and primary states — occupies a contested but increasingly central position in the depth-psychology corpus. Stanislav Grof furnishes the term’s most systematic elaboration: non-ordinary states accessed through LSD or Holotropic Breathwork disclose strata of the psyche ordinarily unavailable to observation, demanding, in his view, a wholesale revision of Newtonian-Cartesian assumptions about mind and reality. The phenomenological range he documents — perinatal matrices, transpersonal experience, near-death perception — presses against the boundaries of psychiatric nosology, which historically misread such states as pathological. Robin Carhart-Harris approaches the same territory through neurodynamics, proposing that psychedelic and other ‘primary’ states represent high-entropy conditions in which the default mode network’s regulatory hierarchy collapses, yielding access to more archaic, less constrained modes of processing he links explicitly to Jung’s collective unconscious. William James, standing upstream of both, insisted on the noetic authority of mystical states and their irreducibility to ordinary waking cognition. The tension running through the corpus is diagnostic versus revelatory: whether non-ordinary states are derangements to be corrected or epistemic apertures to be cultivated. Clarissa Pinkola Estés’ invocation of such states as sources for mythological reconstruction and Spiegelman’s Jungian account of ego-dissolution both affirm the revelatory position, while the broader clinical literature maintains therapeutic rather than metaphysical framings.