work of multiple authorship: Tibetan version (pp. 1-19): Ven. Jampa Tenzin, Lobpon Chenyang Gyatso, Shedup Tenzin; English version (pp. 20-36): Prof. N. Jimpa, Lama Tenzin Dhargyal, Ms. Tanya Zivkovik, Sonam Dorjee Pasang