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.