Campbell introduces us to the core ideas at the heart of the Eastern traditions and explores what Aldous Huxley called the Perennial Philosophy and how it is realize in Hinduism and Buddhism. He traces the development of the idea of spiritual emancipation from the early Indus Valley civilizations through the Vedic literature to the Upanishads. Campbell identifies the point of departure between the Eastern and Western traditions. Finally, Campbell explains the concept of Nirvana and sets the stage for the arrival of the Buddha.

Campbell uses stories of the Buddha's life and enlightenment to reflect the essence of the Buddhist religion. He explains the difference between the two principal types of Buddhism - Theravada (Hinayana) and Mahayana. Campbell also probes the differences between Eastern and Western religion by focusing on Buddhism as a religion of "identification with" the divine rather than on of "relationship to" it. He also compares Buddhism with Taoism and Confucianism and explores an ancient collision of East and West.

Our Eternal Selves introduces us to the systems of yoga that grew out of the mainstream of India spiritually. Campbell demonstrates how the Eastern way of perceiving consciousness is radically different from how it is perceived in the West. He demonstrates how yoga acts as a mediation to bring the practitioner to ever-higher stages of consciousness, to unite one's personal consciousness with the eternal, undifferentiated consciousness of the divine.

Campbell demonstrates how Tibetan Buddhists turn the ritual experience of death into a spiritual exercise. Trace with him the stages of the Tibetan Book of the Dead in which the Llama prepares a dying man and his family for the final moments of life. This passage, in fact, is a journey downward through the chakras, the centers of energy of Kundalini Yoga. Campbell reveals how the Eastern tradition reaches its most sophisticated expression in the art, philosophy and mysticism in the Buddhism of Tibet.