Philip Teertha Mistlberger has been a transpersonal therapist, groupleader, and spiritual teacher for close to twenty years. He was born in Montreal and was educated at John Abbott College and Concordia University. He is the author of the book A Natural Awakening: Realizing the True Self in Everyday Life.

He trained in an “A Course In Miracles” community from 1986-88, graduating from two 6-month programs and receiving certification as an ACIM practitioner in 1988. He also spent a year in a Gurdjieff group, seven years with the East Indian mystic Osho, and has received Tibetan Buddhist empowerments. In 1993 along with Duane O'Kane he co-founded Clearmind Institute and was co-director for its first 18 months. In 1994 he founded Shamballa Trainings, a personal growth school based on a variety of spiritual teachings, that he directed for seven years.

From 2002 to 2004 he taught Advaita Vedanta via formal satsang meetings that he hosted in Canada and the U.S. Phil has traveled widely, through Asia (where he made two prolonged stays in ashrams and monasteries), the Middle East and North America, in search of spiritual truths.