The ethnographic treatment of "rites de Passage" is discussed with reference to material relating to religious initiation. It is suggested that the major transitions engendered through the Tibetan Buddhist Tantric W a n g Kur rituals may be profitably analyzed not simply as changes in social status but rather as tools for the re-ordering of phenomenology which are designed to engender long-term alterations in the initiates' experience of the world. The initiation provides a rationale and instruction conjunctive with ritual technique which is consciously designed to globally and permanently alter the consciousness of the practitioner. Suggestions for studies of rites of passage which take into account this dimension of the ritual control of experience are offered.