Rainbow Body: Immanent Luminosity in a Tibetan Buddhist Dzogchen Scripture

This paper examines the Tibetan Buddhist contemplative theory of the rainbow body (’ja’ lus), according to which the material body transforms into multicolored light at the culmination of awakening. While widely known in Tibetan Buddhist communities and cultures—and increasingly referenced in popular spiritual discourse—the doctrinal mechanism underlying this transformation remains insufficiently understood. I provide an example from the eleventh–twelfth century Great Perfection Heart Essence (rdzogs chen snying thig) corpus, in which the rainbow body phenomenon is theorized as an alchemical resolution of the body’s elemental constituents—earth, water, fire, and wind—into their purified mode as “clear light” (’od gsal). I further connect this theory to contemplative practices involving meditation on entoptic visions of luminous forms, typically experienced in dark retreat. The paper thus presents a model of religious light understood as the latent ontological condition of the body disclosed through contemplative perception.