Śaucha, the first Niyama is dealt with in the second chapter, Sādhana Pāda, of the Yoga Sūtras. While sūtra 2.40 stresses physical (external) cleanliness, the sūtra 2:41 focuses on the benefits of mental (internal) purity. Remaining aware of our inner conversation is critical to both inner and outer purification. Anger, hate, jealously, prejudice, greed, pride, …
yogajivan 