So this is the perfect system. Mad-gatenāntar-ātmanā. "Anyone who is thinking of Kṛṣṇa always within himself, he is first-class yogi." If you want perfection in yoga system, don't be satisfied only by practicing a course of āsana. You have to go further. Actually, the perfection of yoga system means when you are in samādhi, always thinking of the Viṣṇu form of the Lord within your heart, without being disturbed. Therefore the yogis go in a secluded place, and in samādhi they... Controlling all the senses and the mind. You have to control the mind, control the senses, and concentrate everything on the form of Viṣṇu. That is called perfection of yoga. And after that, there are other siddhis, aṣṭa-siddhi-aṇimā, laghimā, prāpti.
So actually this yoga system is very, very difficult. It may be possible by some solitary man, but for the general mass of people it is not possible. The general mass of people, that is recommended in the śāstra that
- harer nāma harer nāma harer nāmaiva kevalam
- kalau nāsty eva nāsty eva nāsty eva gatir anyathā
- (CC Adi 17.21)
There is no other alternative. Nāsty eva, nāsty eva. There is no other alternative, no other alternative, no other alternative. Three times. Three times means yoga, jñāna, and arcana. Yoga system as it was recommended in the Satya-yuga, kṛte yad dhyāyato viṣṇum, that is yoga—always in meditation of Viṣṇu. That is called yoga. Kṛte yad dhyāyato viṣṇuṁ tretāyāṁ yajato makhaiḥ (SB 12.3.52). And in the Tretā-yuga, by performing great sacrifices, yajñas. And in the Dvāpara-yuga, by temple worship. Kalau tad dhari-kīrtanāt: in the Kali-yuga, this age...
The present age is called Kali-yuga. Kali-yuga means the age of quarrel and disagreement. Nobody agrees with any other man. Everyone has got his own theory; everyone has got his own philosophy. So therefore it is called Kali-yuga. And if I don't agree with you, you fight with me. Therefore it is called Kali-yuga. So this is the only method recommended in this age: kalau tad dhari-kīrtanāt. Simply by chanting the holy name of God, one can attain perfect self-realization, which was attained by the yoga system in the Satya-yuga, which was attained in the Tretā-yuga by performing great sacrifices, and which was performed in the Dvāpara-yuga by large-scale temple worship. That thing can be attained by the simple method hari-kīrtanāt. Hari means the Supreme Personality of Godhead; kīrtanāt—by glorifying Him. This is the method recommended in the śāstras. And Lord Caitanya Mahāprabhu, five hundred years ago, He appeared in a town which is known as Navadvīpa. It is about sixty miles northern side of Calcutta. People still go there. We have got our temple, center there. It is also a sacred pilgrimage. So Caitanya Mahāprabhu appeared there, and He started this saṅkīrtana movement, mass saṅkīrtana movement, without any discrimination. And He predicted that this saṅkīrtana movement would be spread all over the world and the Hare Kṛṣṇa mantra would be chanted in every village, town on the surface of the globe.