According to the śāstras: bhaktyā bhāgavataṁ grāhyaṁ na buddhyā na ca ṭīkayā. One should understand the Bhagavad-gītā and Śrīmad-Bhāgavatam by hearing them from a real devotee. One cannot understand them simply by erudite scholarship or sharp intelligence. It is also said:
gītādhītā ca yenāpi
To one who reads the Bhagavad-gītā with faith and devotion, the essence of Vedic knowledge is revealed. And according to the Śvetāśvatara Upaniṣad (6.23):
yasya deve parā bhaktir
yathā deve tathā gurau
tasyaite kathitā hy arthāḥ
All Vedic scriptures are to be understood with faith and devotion, not by mundane scholarship. We therefore present the Bhagavad-gītā As It Is. There are many so-called scholars and philosophers who read the Bhagavad-gītā in a scholarly way. They simply waste their time and mislead those who read their commentaries.
Ref>>Srila Prabhupada Vani.