So Kṛṣṇa and Viṣṇu, the same, and it is stated in the śāstras that by chanting one thousand holy names of Viṣṇu you can get the result of chanting . . . once chanting the name of Rāma. If you, say, only chant Rāma, by this chanting, you immediately get the result of chanting thousand times Viṣṇu's name. And by chanting three times Lord Rāma's name you get the result of chanting once Kṛṣṇa's name. Therefore by chanting Kṛṣṇa's name you get all the good results.
Caitanya Mahāprabhu therefore recommends this. He recommends; not that He has manufactured. He recommends the śāstric injunction: harer nāma harer nāma harer nāmaiva kevalam (CC Adi 17.21). So the harer nāma or viṣṇu-nāma or devotional service to Viṣṇu . . . Śravaṇaṁ kīrtanaṁ viṣṇoḥ (SB 7.5.23). You should always remember this, because sometimes rascals mislead that "Any name."
In Bengal it is very popular. There is a party, they chant kālī-kīrtana, "Kālī, Kālī, Kālī," imitation. Or there are so many so-called avatāras. There was another rascal, he added his wife's name. (laughter) Yes. And the rascal, (chuckles) foolish scholars also accepted.
Yes. "Haro kusuma, haro kusuma, kusuma kusuma, haro . . ." like that. The rascal's name was Haro, and his wife's name was Kusuma, so he made a mantra, haro kusuma, haro kusuma, kusuma kusuma, haro haro. (laughter) And the rascal followers also accepted that this is . . .
So this is going on. A Māyāvādī philosophers, they are so dangerous that they mislead their follower to the hell. Caitanya Mahāprabhu has therefore strongly warned, māyāvādi-bhāṣya śunile haya sarva-nāśa (CC Madhya 6.169): "If you attempt to hear some Māyāvādī philosopher, then your life will be spoiled. Your path to devotional service will be blocked. So don't try to hear a Māyāvādī." This is the recommendation by Caitanya Mahāprabhu.
So we should always remember, when there is question of chanting the holy name, that means Viṣṇu, not any other's name. Vyāharaṇaṁ viṣṇor yatas tad-viṣayā matiḥ (SB 6.2.10).
So there is advantage, a special advantage. What is that advantage? Immediately you become freed from all sinful reaction by chanting Viṣṇu's name, Hari's name, Hari's name, Kṛṣṇa's name. And, and . . . even not immediately; that is the beginning of your spiritual life. Because without being freed from sinful reactionary life, there is no possibility of becoming a pure Vaiṣṇava. He may be a Vaiṣṇava, performing the devotional service in the routine work, but if his behaviour is not sinless he is called kadācāra, sudurācāra.