As soon as one becomes a devotee of the Lord, he has a direct relationship also with the Lord. That is a subject matter very long, but briefly it can be stated that a devotee is in relationship with the Supreme Personality of Godhead in five ways. One may be a devotee in a passive state, one may be a devotee in active state, one may be a devotee as a friend, one may be a devotee as parent, and one may be a devotee as conjugal lover.
So Arjuna was a devotee in relationship with the Lord as a friend. The Lord can become a friend. Of course, this friendship and the conception of friendship which we have got in the mundane world, there is a gulf of difference. This is transcendental friendship which... Not that everyone will have the relationship with the Lord. Everyone has got a particular relationship with the Lord and that particular relationship is evoked by the perfection of devotional service. At the present status of our life we have not only forgotten the Supreme Lord, but also we have forgotten our eternal relationship with the Lord. Every living being, out of many, many millions and billions of living beings, each and every living being has got a particular relationship with the Lord eternally. That is called svarūpa. Svarūpa. And by the process of devotional service one can revive that svarūpa of oneself. And that stage is called svarūpa-siddhi, perfection of one's constitutional position. So Arjuna was a devotee and he was in touch with the Supreme Lord in friendship.
Now, this Bhagavad-gītā was explained to Arjuna and how Arjuna accepted it? That should also be noted. How Arjuna accepted the Bhagavad-gītā is mentioned in the Tenth Chapter. Just like
- arjuna uvāca
- paraṁ brahma paraṁ dhāma
- pavitraṁ paramaṁ bhavān
- puruṣaṁ śāśvataṁ divyam
- ādi-devam ajaṁ vibhum
- āhus tvām ṛṣayaḥ sarve
- devarṣir nāradas tathā
- asito devalo vyāsaḥ
- svayaṁ caiva bravīṣi me
- (BG 10.12-13)
- sarvam etad ṛtaṁ manye
- yan māṁ vadasi keśava
- na hi te bhagavan vyaktiṁ
- vidur devā na dānavāḥ.
- (BG 10.14)
Now, Arjuna says, after hearing Bhagavad-gītā from the Supreme Personality of Godhead, he accepts Kṛṣṇa as paraṁ brahma, the Supreme Brahman. Brahman. Every living being is Brahman, but the supreme living being or the Supreme Personality of Godhead is the Supreme Brahman or supreme living being. And paraṁ dhāma. Paraṁ dhāma means He is the supreme rest of everything. And pavitram. Pavitram means He is pure from material contamination. And He's addressed as puruṣam. Puruṣam means the supreme enjoyer; śāśvatam, śāśvata means from very beginning, He's the first person; divyam, transcendental; devam, the Supreme Personality of Godhead; ajam, never born; vibhum, the greatest.
Now one may doubt that because Kṛṣṇa was the friend of Arjuna, therefore he might say all these things to his own friend. But Arjuna, just to drive out this kind of doubts in the mind of the readers of Bhagavad-gītā, he establishes his proposition by the authorities. He says that Lord Śrī Kṛṣṇa is accepted as the Supreme Personality of Godhead not only by himself, Arjuna, but He is so accepted by authorities like Nārada, Asita, Devala, Vyāsa. These personalities are great personalities in distributing the Vedic knowledge. They (are) accepted by all ācāryas. Therefore Arjuna says that "Whatever You have spoken so far to me, I accept them as completely perfect."