Madhudviṣa: ...cannot become a medical practitioner by simply reading the books. He must study under a medical practitioner. So in the case of your books, is it possible to become a devotee without actually having personal association with you? Just by reading your books?
Prabhupāda: No, it is not that you have to associate with the author. But one who knows, if you cannot understand you have to take lesson from him. Not necessarily that you have to contact with the author always.
Devotee: Just like the textbooks are not written by the teachers; they're written by other professors.
Devotee: Usually you don't even meet the author.
Prabhupāda: Simply one who knows the subject matter, he can explain.
Madhudviṣa: But can your, would your purports, would that serve as explanation besides...
Prabhupāda: No, no, anyone who knows the subject matter, he will be able to explain. Not necessarily the author is required to be present there. (break) ...to study from a medical man, I never said you have to study from the author. Or one who understood the author's purpose. Just like we are explaining Bhagavad-gītā as it is. Not that one has to learn directly from Kṛṣṇa. One who has understood Kṛṣṇa, from him. That is paramparā system.