In Bombay there is a so-called rascal, he says, "The chanting of Hare Krsna mantra and chanting of Coca-Cola is the same." He is such a rascal. He does not know that this is not a vibration of this material world. But one who has no knowledge, they think that "What is the meaning of this chant, 'Hare Krsna, Hare Krsna'?" But they can practically see that we can go on chanting day and night, still we shall not become tired, but any other material name you take, after chanting three times you will feel tired. That is the proof. You can go on chanting day and night, you will never feel tired. So these people, poor people, they have [no] brain to understand.

>>> Ref. VedaBase => Srimad-Bhagavatam 2.1.1–2 — April 6, 1973, New York