"One should approach a bona fide guru to inquire about the highest benefit of life. Such a guru is described as follows: sabde pare ca nisnatam. Such a guru does not manufacture gold or juggle words. He is well versed in the conclusions of Vedic knowledge (vedais ca sarvair aham eva vedyah). He is freed from all material contamination and is fully engaged in Krishna's service. If one is able to obtain the dust of the lotus feet of such a guru, his life becomes successful. Otherwise he is baffled both in this life and in the next."
(Srimad-Bhagavatam 5.14.13, Purport)
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