Willpower is concrete, not ethereal. When you do something, you demonstrate your willpower, and it becomes all the easier to have the same power of will the next time.
B.K.S. IyengarYoga has a threefold impact on health. It keeps healthy people healthy, it inhibits the development of diseases, and it aids recovery from ill health.
B.K.S. IyengarMany ask me whether pranayama ... postpones old age. Why worry about it? Death is certain. Let it come when it comes. Just keep working. The soul has no age. It doesn't die. Only the body decays. And yet, we must never forget the body, since it is the garden we must cherish and cultivate.
B.K.S. Iyengar