This work investigates the foundational principles of classical yoga through a rigorous translation and commentary on the Yoga Sutras of Patanjali. B.K.S. Iyengar, a preeminent authority in the field, utilizes his decades of practice and pedagogical experience to bridge the gap between ancient Sanskrit aphorisms and modern application. The text serves as a comprehensive framework for understanding the psychological and physical discipline required to achieve the state of yoga, or union of the self.

This text is widely regarded as a definitive resource for serious practitioners and scholars of yoga philosophy. Its dense, analytical approach provides a rigorous intellectual foundation for those seeking to understand the historical and spiritual roots of the discipline.