Sutra:: A sutra (thread) is a literary exposition composed of concise, meaningful statements. The “Yoga Sutras” were compiled by Patanjali, an Indian scholar in the ~2nd century BCE. This text provides the practical foundation for the underlying philosophy of Yoga. There are many interpretations of the Sutras, my favorites being: “Light on the Yoga Sutras of Patanjali” by BKS Iyengar (in-depth), and “Yoga Sutras of Patanjali” by Mukunda Stiles (more concise).