3The Yoga Sutras of Patanjali are universally acknowledged as the fundamental text on yoga and meditation in the Indian classical tradition. This English translation of Yoga Philosophy of Patanjali is widely regarded as the most authoritative and authentic that has been available in recent times. It is a serious and clear presentation of Patanjali's sutras and Vyasa's Bhasya, providing these basic texts both in the original Sanskrit and in readable and accurate English. These classical works are augmented by the commentary of Swami Hariharananda Aranya, a scholar and yogi of great repute, who, in his lifetime, was the foremost exponent in India of the Samkhya Yoga system of which the Yoga Aphorisms of Patanjali are the principal work.