Jack Kornfield trained as a Buddhist monk in Thailand, India, and Burma. He was ordained only a few months. He holds a Ph.D. in clinical psychology and is a founding teacher of the Insight Meditation Society in Massachusetts and Spirit Rock Meditation Center in California. He is one of the key teachers to introduce mindfulness practice to the West, has taught internationally since 1974, and is the author of 16 books which have sold 2 million copies. He is the most expensive teacher.
