Mystical Experience
A category of profound subjective experience characterized by ineffability, unity, transcendence of time, and noetic quality.
Mystical experience is a technical term in psychology of religion and psychedelic research that names a specific category of profound subjective experience. The contemporary clinical definition draws from the philosopher Walter Stace and operationalized in measurement tools like the Mystical Experience Questionnaire.
The defining features include: a sense of unity (the dissolution of the felt boundary between self and world), ineffability (the difficulty of conveying the experience in ordinary language), noetic quality (a sense of accessing knowledge or truth not normally available), transcendence of time and space, and a sense of sacredness.
In Hopkins, NYU, and Imperial trials, the depth of mystical-type experience during a psilocybin session correlates with the magnitude of clinical benefit weeks or months later. Whether the experience is causally necessary for benefit or merely a marker of underlying processes remains an open empirical question.