Book excerpt: The Yoga Sutra of Patanjali is a classic Sanskrit treatise consisting of 195 “threads,” or aphorisms, describing the process of liberation through yoga. Although little is known about Patanjali (most scholars estimate that he lived in India circa 200–300 B.C.), his writings have long been recognized as a vital contribution to the philosophy and practice of yoga. This new, expert translation of the original Sanskrit text of Patanjali’s best-known work presents his seminal ideas and methods in accessible, plain-language English. Patanjali organized the sutra into four parts: Samadhi (absorption), Sadhana (practice), Vibhuti (supernatural powers), and Kaivalya (liberation). Each represents a step in breaking free of our limited definition of consciousness and training the mind to achieve oneness with the universe. Geshe Michael Roach, one of the most respected teachers of Tibetan Buddhism in America and a renowned scholar of Sanskrit, provides authoritative commentary on each of the sutras. His notes and clarification are straightforward and highly readable, untainted by obscure, academic terminology or New Age jargon. The first edition of the Yoga Sutra to present a Buddhist perspective, this paperback original will be welcomed by students and spiritual seekers alike.