The foundations of Vajrayana practice are laid out with eloquence and precision here by one of the greatest Tibetan Buddhist masters of our age. His Holiness Dudjom Rinpoche's commentary on the preliminary practices (ngöndro) is informed by his profound realization and wide-ranging scholarship, and illuminated with an array of quotations from the Vinaya, Sutra, and Tantra traditions. In addition to the commentary on the outer and inner preliminary practices, he provides other invaluable instruct