B.K.S. Iyengar Quote

As a mountaineer needs ladders, ropes and crampons as well as physical fitness and discipline to climb the icy peaks of the Himalayas, so does the Yoga aspirant need the knowledge and discipline of the Hatha Yoga of Swatmarama to reach the heights of Raja Yoga dealt with by Patanjali."
~B.K.S. Iyengar -Light on Yoga, p. 23.