The vow to perfect oneself in order to perfect others is called the thought of enlightenment or bodhichitta. This implies that every single action word or thought even the most trivial is dedicated to the good of all beings. To accomplish the good of others, we must first perfect ourselves by purifying and transforming our minds. This is the aim of what we call the preliminary practices, which establish the foundations of all spiritual progress. In this book, Dilgo Khyentse Rinpoche explains a key practice text composed by Jamyang Khyentse Wangpo (1820 1892) on the Vajrayana preliminaries:...