On the other hand, if the guru is following all the principles of bhakti, if he is in the line of his gurudeva, if he is chanting and remembering but he is not learned enough to give you krsna-tattva, then don’t give him up. With honor for him, take his permission, and go with his permission to associate with exalted Vaisnavas. And, if he does not give permission, you can consider that he is also among the kan-gurus meant for being given up. Srila Bhaktivinoda Thakura has explained all this in chapter 20 of Jaiva Dharma, and I request you all to read this right away.
Sannyasi Thakura’s character was extremely high. He knew brahma-tattva, which means he could discriminate between the transcendental and the material, this ability is called brahma-nistha. Bhagavad-gita states:
na socati na kanksati
samah sarvesu bhutesu
mad-bhaktim labhate param
“One who is thus transcendentally situated at once realizes the Supreme Brahman and becomes fully joyful. He never laments or desires to have anything. He is equally disposed toward every living entity. In that state he attains pure devotional service unto Me.” (Bg 18.54)
What is the meaning of na socati? If anything has gone wrong, if one has lost his position, wealth, reputation, and everything else, such a person does not lament. If he one day finds himself homeless, he becomes very happy and thinks, “Now I am okay.” If his wife divorces him, he thinks, “Very good; very good. I wanted this. She has done well.” In either case he will not be unhappy. Na kanksati. He never has any worldly desire. He only and always wants the association of that high class of Vaisnavas. He wants to serve them, and he especially wants to serve the words coming from their lotus mouths.
Murwillumbah, Australia: Feb. 15, 2002 (Evening, Part 1)