(Click to enlarge photo of Srila Prabhupada)
"Cheaters are always there to manufacture their own way of spiritual realization. To get some material benefit, the conditioned soul approaches these pseudo sannyāsīs and yogīs for cheap blessings, but he does not receive any benefit from them, either spiritual or material. In this age there are many cheaters who show some jugglery and magic. They even create gold to amaze their followers, and their followers accept them as God. This type of cheating is very prominent in Kali-yuga. Viśvanātha Cakravartī Ṭhākura describes the real guru in this way.
vande guroḥ śrī-caraṇāravindam
One should approach a guru who can extinguish the blazing fire of this material world, the struggle for existence. people want to be cheated. and therefore they go to yogīs and svāmīs who play tricks, but tricks do not mitigate the miseries of material life. If being able to manufacture gold is a criterion for becoming God, then why not accept Kṛṣṇa, the proprietor of the entire universe, wherein there are countless tons of gold? As mentioned before, the color of gold is compared to the will-o’-the-wisp or yellow stool; therefore one should not be allured by gold-manufacturing gurus but should sincerely approach a devotee like Jaḍa Bharata. Jaḍa Bharata instructed Rahūgaṇa Mahārāja so well that the King was relieved from the bodily conception. One cannot become happy by accepting a false guru. A guru should be accepted as advised in Śrīmad-Bhāgavatam (11.3.21). Tasmād guruṁ prapadyeta jijñāsuḥ śreya uttamam: One should approach a bona fide guru to inquire about the highest benefit of life. Such a guru is described as follows: śābde pare ca niṣṇātam. Such a guru does not manufacture gold or juggle words. He is well versed in the conclusions of Vedic knowledge (vedaiś ca sarvair aham eva vedyaḥ [Bg. 15.15]). He is freed from all material contamination and is fully engaged in Kṛṣṇa’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."
(Śrīmad-Bhāgavatam 5.14.13, Purport)