The First Tsenshap Serkong Rinpoche explains the stages and paths of tantra based on “The (Tantric) Stages and Paths by the Mongolian.” The explanation covers the four classes of tantra – kriya, charya, yoga and anuttarayoga – and emphasizes purification through deity visualization, building networks of positive potential and deep awareness, and the importance of understanding voidness from sutra sources, while highlighting tantra’s unique use of blissful consciousness for realization. The explanation of kriya and charya tantras focuses on external rituals, initiations, approximation retreats with mantra recitation and concentration or mental constancy practice, and actual attainments such as pacifying or increasing powers. Since taking and purely keeping bodhisattva vows is necessary for all classes of tantra, there is an explanation of the 18 root and 46 secondary bodhisattva vows. Yoga tantra stresses inner methods, including yogas with and without signs, vajra master initiations and attainments like knowledge-holder bodies through concentrations and recitations. Anuttarayoga tantra, the highest class, involves advanced initiations (vase, secret, deep awareness and word initiations) and generation and complete stage practices. Both yoga and anuttarayoga tantra include taking and keeping the root and secondary tantric vows.