Not all practitioners can jump to that highest level. They have to climb, step by step from the physical sphere to reach the spiritual sphere. If it is treated as exercise it is not the fault of yoga but of the practitioners.
B.K.S. IyengarYour whole being should be symmetrical. Yoga is symmetry. That is why yoga is a basic art.
B.K.S. IyengarBefore peace between the nations, we have to find peace inside that small nation which is our own being.
B.K.S. Iyengar