The four chapters of the Yoga Sutras offer many dictums of self-realization and techniques for evolution aimed at both body and mind.
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Light on the Yoga Sutras of Patanjali : B. K. S. Iyengar : Free Download, Borrow, and Streaming : Internet Archive
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Four Chapters on Freedom: Commentary on the Yoga Sutras of Patanjali : Yoga Publications Trust: : Books
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