This is an important turning point in LSD psychotherapy; beyond this point, elements characteristic of BPM II, III, and IV no longer appear in the sessions or as determinants of the free intervals.
Grof identifies ego death as the structural therapeutic turning point in LSD psychotherapy, beyond which the perinatal matrices of constriction and agony cease to organize the patient’s experience.
, LSD Psychotherapy: Exploring the Frontiers of the Hidden Mind, 1980thesis