"Don't try to become a master, falsely. That will never be successful. Remain servant of Kṛṣṇa, you'll be happy. That is the business of spiritual master. He gives the right information; therefore he is respected so much, because he does not cheat. 'You can become master, even God you can become'—this is cheating. The real spiritual master says that 'You can never become master. You are always servant.' And therefore he's worshiped. He gives the right information. Therefore he is honored so, because he does not cheat. The so-called spiritual master is cheating, that 'You take this mantra and give me some money and you become God.' This cheating is going on. Spiritual master is to be worshiped. Why? Because he does not cheat. He gives the right information. That is his credit. Guruṣu nara-mati. Therefore one should not take guru as ordinary human being. Ordinary human being, he'll cheat you, or he'll give some information, he's cheating. But a guru, real guru, he'll not cheat you."
(Srila Prabhupada Conversation, New Vrindaban, June 22, 1976)