The Yoga Sutras of Patanjali are 196 Indian sutras (aphorisms). The Yoga Sutras were compiled prior to 400 CE by Sage Patanjali, taking materials about yoga from older traditions. The Yoga Sutras of Patanjali was the most translated ancient Indian text in the medieval era. In the 20th century the western practitioners of yoga elevated the Yoga Sutras to a status it never knew previously. Scholars consider the Yoga Sutras of Patanjali formulations to be one of the foundations of classical Yoga philosophy of Hinduism. A must have for anyone who practices the philosophy and asana of yoga.