" a consensus has emerged that the vast majority of ritual ceremonies are concerned primarily with healing in a general sense. They exert influence on physical well-being, heighten identity, enhance interpersonal cohesion, reintegrate community into the environment, and mitigate perceived conflicts with supernatural powers. In spite of the cultural diversity of therapeutic institutions and practices, the fundamental healing principles show a good deal of cross-cultural uniformity. "

― Rick Strassman , Inner Paths to Outer Space: Journeys to Alien Worlds through Psychedelics & Other Spiritual Technologies