The secret of understanding Bhagavad-gītā is here, and if you follow these principle . . . just like when you purchase one bottle of medicine from the, I mean to say, drug shop, there is dose. Read, "This medicine is to be taken by this dose." If you follow the direction of the bottle label then you get benefit. Similarly, here is the direction: evaṁ paramparā-prāptam (BG 4.2). You have to understand Bhagavad-gītā from the disciplic succession, and that that it means one who is devotee. Devotee, a devotee . . . this disciplic succession, devotee. Otherwise there is no possibility. If that disciplic succession is something else than devotional service, then he cannot understand Bhagavad-gītā.
There are many practical experiences, and so many scholars, books we have studied, and their commentary is all nonsense because they are not bhakta. They try to understand Bhagavad-gītā simply by their academic qualification. That is not possible. That is not possible. If somebody is trying to Bhagavad-gītā by his academic qualification . . . what is the value of this academic qualification? It has no value in the presence of spiritual science. It is a different thing. It is to be understood in a different process.