The Yoga Sutras of Patanjali were written around the time of Jesus, give or take 200 years. The practice of yoga began in India as early as 1000 years prior, but the Yoga Sutras are the most important compendium of this ancient oral tradition, and virtually all later schools of yoga begin with Patanjali. Little is known about him, but there is evidence he was an educated philosopher, grammarian, and physician-a long-lost medical work is attributed...