Caitanya Mahaprabhu says that don’t talk all nonsense thing. Simply say the real thing.
And what is the real thing? That is explained by Krsna: sarva-dharman parityajya mam ekam saranam vraja [Bg 18.66]. You take this mission, “My dear sir, you give up everything nonsense. You simply surrender to Krsna.” Then you become guru. Is it very difficult to become guru? No. But we shall not take this business. We shall talk all nonsense and become guru and incarnation and God and so on, so on, and cheat others and cheat oneself. This is going on. Otherwise, to become guru is not at all difficult.
From Srila Prabhupada’s lecture on Srimad-Bhagavatam 3.25.43 — December 11, 1974, Bombay