The basic characteristics of this experience are transcendence of the subject-object dichotomy, exceptionally strong positive affect (peace, tranquility, serenity, bliss), a special feeling of sacredness, transcendence of time and space, experience of pure being
Grof provides the foundational clinical definition of Cosmic Unity as a discrete transpersonal experience arising in LSD sessions, characterized by dissolution of ego boundaries, oceanic ecstasy, and access to knowledge of cosmic relevance.
, Varieties of Transpersonal Experiences: Observations from LSD Psychotherapy, 1972thesis