"He who has conquered his mind is a Raja Yogi. . . . .It is generally believed that Raja Yoga and Hatha Yoga are entirely distinct, different and opposed to each other, that the Yoga Sutras of Patanjali deal with Spiritual discipline and that the Hatha Yoga Pradipika of Swatmarama deals solely with physical discipline. It is not so, for Hatha Yoga and Raja Yoga complement each other and form a single approach towards Liberation.
* B.K.S. Iyengar