This rascaldom is going on, whole world. Big, big rascal svāmīs, they say: "Why you are finding out God anywhere? You do not see so many rascal Gods are loitering in the street?" This is going on. If you simply consult dictionary, you can understand what is the meaning of God. God is so cheap thing, huh? Supreme Being. Are you Supreme Being? Supreme means the highest authority. Highest authority means nobody is equal to him, nobody is greater than him. That is supreme. So these rascals who are claiming to become God, is it a fact that nobody is equal to him, nobody is greater than him? There are so many. So this kind of guru, this kind of rascal, will not help you. Guru must come from the paramparā system by disciplic succession. Five thousand years or five millions of years, what was spoken by the supreme God or guru, the present guru also will say the same thing. That is guru. That is bona fide guru. Otherwise, he's not guru. Simple definition. Guru cannot change any word of the predecessor.
There is one instance in Caitanya Mahāprabhu's life. One gentleman, (he) is Vallabha Ācārya. He was very much devotee of Caitanya Mahāprabhu. He wrote one comment on Śrīmad-Bhāgavatam, Subodhinī-ṭīkā, it is called. That is recognized, nice ṭīkā, comment. But he approached Caitanya Mahāprabhu. He was very great devotee of Caitanya Mahāprabhu. So he simply said that "Caitanya Mahāprabhu, Lord Caitanya, if You hear my comment on the Śrīmad-Bhāgavatam, You'll find it is far better than Śrīdhara Svāmī's." Śrīdhara Svāmī is the very old commentator. So Caitanya Mahāprabhu immediately rejected: "Oh, you are claiming that you have written something better than Śrīdhara Svāmī? Oh." He chastised him. Svāmī means another . . . He sarcastically remarked, the word svāmī, Śrīdhara Svāmī, svāmī, another svāmī means "husband." So He said, svāmī jīva nahi mane besa bali guni: "I think one who does not recognize svāmī, he's a prostitute." He immediately said: "You do not recognize Śrīdhara Svāmī, then you are a prostitute. How can I hear from a prostitute?" He refused. Only word that, "I have written better than Svāmī."
So this is the process of guru. You cannot disobey the previous ācārya or guru. No. You have to repeat the same thing. Not research. Sometimes rascals come, that "You are speaking the same thing. Why don't you speak something new by research work?" (chuckles) We say that we have no intelligence; we cannot make any research. We are . . . guru more mūrkha dekhi koriyā vicāra (CC Adi 7.71). Caitanya Mahāprabhu said that, "My Guru Mahārāja saw Me a great fool number one." So one who remains a great fool number one before his guru, he is guru. And one who says that, "I'm advanced so much that I can speak better than my guru," then he's rascal. This is the process.