Ātma-viśuddhaye. The whole process is, yoga system is, for purifying ātmā. Purifying ātmā. You always remember that ātmā means this body, ātmā means the mind, ātmā means the soul. So purifying these things. So yoga system is made not that cheaply I want some power. Sometimes the yogīs, they achieve very wonderful power.
Aṣṭa-siddhi-yoga. Aṣṭa-siddhi, eight kinds of perfection, material perfection, they can attain. Not for that purpose yoga sys . . . although they attain that power, real yogīs, they do not exhibit it. They do not exhibit it. (break) He have got the powers, so many wonderful powers, but he doesn't . . . his only aim is ātma-viśuddhaye: "I am now contaminated by this material atmosphere; so I have to purify myself."
So that purification process we shall discuss next day. But I may say in this connection that so much difficult process for purifying the ātmā is very easily done, ceto-darpaṇa-mārjanam (CC Antya 20.12); by chanting this Hare Kṛṣṇa, Hare Kṛṣṇa, Kṛṣṇa Kṛṣṇa, Hare Hare / Hare Rāma, Hare Rāma, Rāma Rāma, Hare Hare. Because the sound, this transcendental sound vibration, is nondifferent from Kṛṣṇa. Kṛṣṇa is absolute. His name is not different from Him. So when you chant His name with devotion, that means Kṛṣṇa is with you. And Kṛṣṇa, when Kṛṣṇa is with you, who how you can remain impure? You become pure, the purest. That is the whole system.