[1]  119
Բիդջդսոր-ջերդ Այ Լի Լյու
[Ch 9]
TRANSLATION
The Supreme Lord said: My dear Arjuna, because you are never envious of Me, I shall impart to you this most secret wisdom, knowing which you shall be relieved of the miseries of material existence.
PURPORTE
As a devotee hears more and more about the Supreme Lord, he becomes enlightened. This hearing process is recommended in the  Śrīmad-Bhāgavatam : “The messages of the Supreme Personality of Godhead are full of potencies, and these potencies can be realized if topics regarding the Supreme Godhead are discussed amongst devotees. This cannot be achieved by the association of mental speculators or academic scholars, for it is realized knowledge.”
The devotees are constantly engaged in the Supreme Lord’s service. The Lord understands the mentality and sincerity of a particular living entity who is engaged in Kṛṣṇa consciousness and gives him the intelligence to understand the science of Kṛṣṇa in the association of the devotees. Discussion of Kṛṣṇa is very potent, and if a fortunate person has such association and tries to assimilate the knowledge, then he will surely make advancement toward spiritual realization. Lord Kṛṣṇa, in order to encourage Arjuna to higher and higher elevation in His potent service, describes in this Ninth Chapter matters more confidential than any He has already disclosed.
The very beginning of  Bhagavad-gūtā , the First Chapter, is more or less an introduction to the rest of the book; and in the Second and Third Chapters, the spiritual knowledge described is called confidential. Topics discussed in the Seventh and Eighth Chapters are specifically related to devotional service, and because they bring enlightenment in Kṛṣṇa consciousness, they are called more confidential. But the matters which are described in the Ninth Chapter deal with unalloyed, pure devotion. Therefore this is called the most confidential. One who is situated in the most confidential knowledge of Kṛṣṇa is naturally transcendental; he therefore has no material pangs, although he is in the material world. In the  Bhakti-rasāmṛta-sindhu  it is said that although one who has a sincere desire to render loving service to the Supreme Lord is situated in the conditional state of material existence, he is to be considered liberated. Similarly, we shall find in the  Bhagavad-gūtā , Tenth Chapter, that anyone who is engaged in that way is a liberated person.