The American mythologist best known for his philosophy to "follow your bliss" worked with which Zen Buddhist teacher who has written books in what categories?
Joan Halifax: Joan Jiko Halifax (born July 30, 1942) is an American Zen Buddhist teacher, anthropologist, ecologist, civil rights activist, hospice caregiver, and the author of several books on Buddhism and spirituality. Joan Halifax:  In the 1970s she collaborated on LSD research projects with her ex-husband Stanislav Grof, in addition to other collaborative efforts with Joseph Campbell and Alan Lomax. Joseph Campbell:  His philosophy has been summarized by his own often repeated phrase: "Follow your bliss."
Buddhism and spirituality