A tour de force of various nondenominational ways to measure the extent of someone's meditation progress, using case studies that analyze ordinary practitioners and advanced meditation adepts from a large variety of spiritual traditions (Zen, Taoist, Tibetan Buddhist, Christian meditation, etc.). No other book ranks the transcendental stages of the spiritual greats according to objective criteria, and evaluates whether they had achieved samadhi or enlightenment. This 700-page instruction manual goes way past comparative religion and reveals specific yoga teachings to help you surpass each spiritual attainment level prior to enlightenment. It melds the best spiritual teachings from Eastern and Western sources. If you want to know what it's like to be taught by Master Nan and how to analyze someone's stage of meditation or spiritual progress, then this is the book to buy.