You cannot understand how it has happened. How it has happened, this is the miracle. Just like when I went to America, I was thinking that "Who will hear me? As soon as I will say that ‘You cannot eat meat, you cannot have illicit sex, you cannot have any intoxication up to smoking and you cannot indulge in gambling,' the next day they will say ‘Please go home.' " Yes. Because it was actually experienced by one of my Godbrothers. He went to London, and Lord Zetland, Marquis of Zetland, He was talking with him, this gentleman at my Godbrother, that "Can you make me brahmana?" He said, "Yes, I can make you brahmana." "How?" "Then give up these four things: don't drink, don't have illicit sex, don't indulge in gambling and don't eat meat." He said, "Impossible!" He said, "Impossible. This is our life." So I was thinking that "As soon as I will prescribe these things, these boys, or these people of America, they will say, ‘Please go home.' " But it is Krsna's mercy. Here it is said, ahaituki. Nobody can understand how it has happened, but actually it has happened. How?
vasudeve bhagavati
bhakti-yogah prayojitah
Simply I advised them to accept Krsna, the Supreme Personality of Godhead, and worship Him. They have done it, and they have attained jnana and vairagya.

From a lecture by Srila Prabhupada
Bombay, March 26, 1972