Dark retreat
Dark retreat (Wylie: mun mtshams) refers to advanced practices in the Dzogchen lineages of the Nyingmapa, Bönpo and other schools of Tibetan Buddhism. The time period dedicated to dark retreat varies from a few hours to decades. Dark Retreat in the Himalayan tradition is a restricted practice only to be engaged by the senior spiritual practitioner under appropriate spiritual guidance. This practice is considered conducive for navigating the bardo at the time of death and for realising the rainbow body. The traditional dark retreat requires stability in the natural state and is only suitable for advanced practitioners. Ayu Khandro and Dilgo Khyentse are examples of modern, if not contemporary, practitioners of significant periods of Dark Retreat sadhana.
Ayu Khandro performed the Yang-Ti (Tibetan), an advanced practice of the Dzogchen Upadesha, a version of the Dark Retreat.
An account of extensive experiences with dark retreat, Dawning of Clear Light: A Western Approach to Tibetan Dark Retreat Meditation, was written by Martin Lowenthal.
