The commercialism may wash off sometime later.
Yoga uses the body to discipline the mind and to reach the soul.
A yogi's brain extends from the bottom of the foot to the top of his head
It is not yoga that injures, but the way one does yoga that leads to injury.
As a well cut diamond has many facets, each reflecting a different color of light, so does the word yoga, each facet reflecting a different shade of meaning and revealing different aspects of the entire range of human endeavor to win inner peace and happiness.
Intellectuals tend to be arrogant. Intelligence, like money, is a good servant but a bad master. When practicing pranayama, the yogi [makes] himself humble and without pride in his intellectual attainments.