Sri Srimad Bhaktivedanta Narayana Maharaja :
Suppose a person unfortunately took initiation from an unqualified guru who was not on the stage of a mahabhagavat. That guru was not realized in the established truths.
tasmad gurum prapadyeta
jijnasuh sreya uttamam
sabde pare ca nisnatam
[“Therefore any person who seriously desires real happiness must seek a bona fide spiritual master and take shelter of him by initiation. The qualification of the bona fide guru is that he has realized the conclusions of the scriptures by deliberation and is able to convince others of these conclusions. Such great personalities, who have taken shelter of the Supreme Godhead, leaving aside all material considerations, should be understood to be bona fide spiritual masters.” (Srimad Bhagavatam 11.3.21).]
The word sabde means sastras, like the Vedas, Upanisads, and so on. It also means the holy name. Pare means Krsna. Suppose that guru had no realization of Krsna or His names or His glories, as told in sastra, and he was only on the level of kanistha-adhikari and still he thought he was guru. He had many worldly desires, such as the the desire for name, fame, and wealth, and someone unfortunately took harinama and diksa from him.
Do the verses that glorify the qualifications of guru apply to that guru or not? Should the disciple obey that guru with the attitude of surrender ordered by all the sastras? Should he follow that guru totally or not? Can a person acquire pure cow milk from a male donkey? Can a person get sweet mangos from a thorn tree? What is the disciple’s duty towards that kind of guru?
Murwillumbah, Australia: December 3, 2002 (Evening – Part 2)