This in depth series of classes is based on the book The Oral Instructions of Mahamudra by Venerable Geshe Kelsang Gyatso Rinpoche. This precious book reveals the uncommon practice of Tantric Mahamudra of the Ganden Oral Lineage, which the author received directly from his Spiritual Guide, Vajradhara Trijang Rinpoche. It explains clearly and concisely the entire spiritual path from the initial preliminary practices to the final completion stages of Highest Yoga Tantra that enable us to attain full enlightenment in this life.