So it is very easy, bhakti-yoga. It is not at all difficult. You haven't got to strain your body as in other haṭha-yoga practice you have to very undergo hardship, to sit in a particular posture, in a particular place. These things are stated in the Bhagavad-gītā. Not that you become yogi in a fashionable city as you'll find nowadays, yoga-āśrama signboard in a fashionable house, and you show some gymnastic, you become a yogi and get some money. Not that. This is bhakti-yoga, begins from jihva. Exercise your jihva, tongue; then you become a perfect yogi.
- mayy āsakta-manāḥ pārtha
- yogaṁ yuñjan mad-āśrayaḥ
- asaṁśayam samagram...
Samagram. Kṛṣṇa you understand fully, not partially. Not partially means not simply understanding impersonal Brahman. That is partial understanding. And then localized Paramātmā, that is also partial understanding. But when you understand Kṛṣṇa, the Supreme Person, that is full understanding. So you simply concentrate your mind unto the person of Kṛṣṇa, mayy āsakta-manāḥ. Here is Kṛṣṇa. We can see Kṛṣṇa. So if we simply concentrate our mind, meditation Sa vai manaḥ kṛṣṇa-padāravindayor vacāṁsi vaikuṇṭha-guṇānuvarṇane (SB 9.4.18). This was the practice done by Ambarīṣa Mahārāja.
So Durvāsā Muni, he was a great yogi, and he became very much envious that "Here is a person who is a gṛhastha and a kṣatriya, he is not even a brāhmaṇa, and he does not practice anything. He is always engaged in his royal activities, and this man is so famous as a great person, great devotee. So I'll chastise him. I'll show." So he wanted to pick up some quarrel with Ambarīṣa Mahārāja, and on dvādaśī day he approached there with sixty thousand disciples and he said, "Mahārāja, arrange for our prasādam. We..." "Yes, welcome." But his purpose was different. So he went to take bath in the Ganges and Yamunā, and then he came late. In the meantime he had to observe dvādaśī-pāraṇa. With the advice of the brāhmaṇas he took little water. The brāhmaṇas advised, "Mahārāja, water is food and no food. It has no actually food value. So your guest has not returned as yet. You can take little water and observe the completion of dvādaśī." So he did it, and Durvāsā came very angry, that "I am your guest, and you have taken food?" That is not food, little water. So he wanted to chastise him. He created a big giant to kill the Mahārāja.