"Patanjali's Yoga Sutra is a foundational ancient text that examines the purpose and practice of yoga. Longtime American Buddhist teacher Roach, who holds the distinguished title of geshe (comparable to a Ph.D. in Buddhist religious studies), provides commentary to McNally's fresh translation of this aphoristic text from ca. 250 B.C.E. Yoga means union, and this interpretation unites the ways of Buddhism and yoga, making it useful for students of either practice. Roach's commentary reveals the text's logic and organization, unpacking its density in 108 short sections, each devoted to a few lines of the text. An index of important ideas in the sutra is helpful…[F]or more experienced students and those interested in the intersection between yoga and Buddhism, this is a stimulating presentation of an influential text."

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