Implementing the resolve to gain enlightenment for the sake of all living creatures involves engaging in the marvelous activities of Bodhisattvas. In order to engage in these activities and live the life of an authentic Bodhisattva, one takes the Bodhisattva vow.
Before His Holiness 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 constitute 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.