Book excerpt: The Samadhi Raja Sutra forms the perfect link between the Mahayana training of a bodhisattva and the profound tradition of Buddhist meditation practice known as Mahamudra. The profound lectures by Khenchen Thrangu Rinpoche, in the style of pith instructions, contain the words of the Buddha as well as an explanation by Jamgon Kongtrul Rinpoche on Mahamudra. Khenchen Thrangu Rinpoche is a realized teacher of Tibetan Buddhism's Kargyu Lineage, possessing the three qualities of learning, pure conduct and noble-mindedness. He is an expert in exposition, debate and composition.