The final volume of the Library of Wisdom and Compassion by His Holiness the Dalai Lama takes us to the uncommon practices and realizations of Vajrayana to the full awakening of a buddha.
His Holiness the Dalai Lama skillfully illuminates the unique qualities of Vajrayana, as practiced in Tibet, and the method to eradicate the subtlest obscurations preventing the full awakening of a buddha. Speaking to newcomers and advanced students alike, he explains the similarities and differences of the Sutra and Tantra paths. Having gathered many of the doubts and difficult points concerning the tantric path, he clarifies the purpose of receiving proper empowerment by qualified gurus and the ethical restraints and commitments required to enter the path of secret mantra. The paths and stages of the four tantric classes are explained, as are the generation-stage and completion-stage practices of Highest Yoga Tantra. You are introduced to the practices of clear appearance and divine identity common to all tantric sadhanas, as well as the distinctive practices of illusory body and actual clear light that overcome the subtlest defilements on the mind and eliminate all obscurations quickly.

The understanding of emptiness in Sutra and Tantra is the same, but the consciousness perceiving emptiness differs. In Highest Yoga Tantra that consciousness is great bliss, which arises from knowing the methods to manipulate the channels, winds, and drops of the subtle body. In short, in Vajrayana and the Culmination of the Path the Dalai Lama sets out the path that leads to blissful awakening and enables us to be of great benefit to all sentient beings.