Purification

Life has to be an incessant process of repair and reconstruction, of discarding evil and developing goodness. Paddy grains have to be de-husked in order to become edible as rice. Cotton has to be converted as yarn to become wearable cloth. Gold nuggets have to be heated in the crucible to remove the impurities. Man too, must purify his impulses, emotions and desires and cultivate good thoughts, words and deeds so that he can progress spiritually.
Sathya Sai Baba

We need to realize this truth and we should not stop at purifying the body as hatha yogis. Asnas cannot purify impulses, desires or emotions.

Dr Krishna Raman