As the conclusion of an intense 2 weeks course at Kagyu Ling, Plaige April 1986, Rinpoche offers two talks from the Profound Inner Principles, in which he introduces the Four States and presents how Nadi, Prana and Bindu relate to mind, to the four states and to the kayas.
For other topics taught during the course, search "Plaige 1986" in the search box.
Tibetan - English
2 talks, audio