Yoga 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. IyengarFaith, courage, and intelligent and uninterrupted awareness - these qualities are to be present whether one is wide awake, half asleep, or in deep slumber. An individual who lives like this performs his daily actions with a mind free from selfishness. This is poise in action. And this poise leads to that serenity which is in the truest sense a healthy mind in a healthy body.
B.K.S. Iyengar