Before the Dalai Lama bestows the Bodhisattva vow, he often teaches the short text known as the Twenty Verses on the Bodhisattva Vow by the Indian master Chandragomin. Chandragomin's text discusses some of the most important features regarding the vow, such as from whom it should be taken, how one should prepare for receiving it, what constitutes transgressions of the vow, and how they should be purified. In clear and accessible terms, Geshe Sonam Rinchen explains how to take and then safeguard the Bodhisattva vow. About the Author Geshe Sonam Rinchen (1933-2013) studied at Sera Je Monastery and in 1980 received the Lharampa Geshe degree. He taught Buddhist philosophy and practice at the Library of Tibetan Works and Archives in Dharamsala, India, as well as in dharma centers around the world.