Patanjali’s Yoga Sutra, written 2200 years ago, is the most authentic and indisputable source text of classical yoga, which is also referred to as “yoga philosophy” because it includes the overall discipline and vision of yoga as well as yoga practices. Learn why commentaries have been written to expand on these 196 sutras and which commentary contains so much wisdom that it is considered to be a companion text as important as the sutras themselves.