The Yoga Sutras of Patanjali are considered by most to be the foundation of yoga as we understand it today. It primarily relied on the Samkhya philosophy, which was the prevalent school of thought at the time Patanjali composed the Sutras.
Today the Sutras are taught in the majority of Yoga courses, and are often quoted in studio classes, but even fifteen hundred years ago it seemed to have been excepted as the canonical text on yoga.
The Vedas were passed down for years from mouth to ear. Patanjali was the first that gathered and displayed the inheritance of ancient yoga to the future generations. Patanjali’s Yoga Sutra is such a deep and detailed research, it has become the main epos of this subject.
B.K.S Iyengar writes that the Yoga Sutras are the deepest, most clear research of the human soul. In only 196 verses he explains how “by practicing Yoga, we can transform, gain control over the thoughts and feelings, overcome obstacles in our path to spiritual development, and gain the purpose of Yoga: Kaivalya, the freedom from enslavement to earthly desires.”