Je Tsognkhapa was a monk of the Sakya tradition of Tibetan Buddhism, whose activities profoundly influenced the formation of the Geluk school. Known also by his ordained name Lobsang Drakpa or as Je Rinpoche, his work centered on deepening the study and practice of Buddhist philosophy. He was a pivotal figure in the development of Tibetan religious thought. His legacy is one of scholarly rigor and dedicated spiritual pursuit.
Tsongkhapa's "Lamp to Illuminate the Five Stages" (1419) offers an in-depth exploration of advanced Buddhist tantra practices, particularly the five stages of Guyhasamaja tantra. Drawing from key Indian sources, it addresses meditation techniques, subtle human physiology, and the processes of dying, bardo, and rebirth, significantly influencing Tibetan Buddhism.