So Bhagavān means the Supreme Personality of Godhead. Absolute Truth is realized in three phases: brahmeti paramātmeti bhagavān iti śabdyate (SB 1.2.11). Absolute Truth can be realized in the beginning as impersonal Brahman, which is the objective of the jñānīs, and next, Paramātmā, which is the objective of the yogis, and at last, the last word in the absolute understanding is person, the Supreme Personality of Godhead. Ultimate issue is the Supreme Personality of Godhead, just like we understand that in the sun globe there is the Supreme Person or the sūrya-nārāyaṇa, or the chief person within the sun planet. His name is also given in the Bhagavad-gītā-Vivasvān. The Lord says in the Fourth Chapter, imaṁ vivasvate yogaṁ proktavān aham avyayam: (BG 4.1) "I first of all explained this science, this yoga system of Bhagavad-gītā, to Vivasvān, the sun-god." Vivasvān manave prāhur manur ikṣvākave 'bravīt. And Vivasvān, the sun-god, he explained to Manu, and Manu explained to his son. In this way, by the disciplic succession the knowledge has come down. So when we speak of jñāna, knowledge, it must be learned from a person. So Bhagavān, the last word in the understanding of Absolute Truth, He says in this Bhagavad-gītā.
So Vyāsadeva specifically means here, bhagavān uvāca. He does not say kṛṣṇa uvāca, because sometimes Kṛṣṇa is misunderstood by the fools. So bhagavān uvāca, this word, means whatever He says, there is no defect or deficiencies. For ordinary person like us there are four defects: bhrama pramāda vipralipsā kara-ṇāpāṭava. Vipralipsā, cheating. Vipralipsā, cheating. So in the Supreme Personality of Godhead Kṛṣṇa or self-realized person, servants of Kṛṣṇa, those who have understood Kṛṣṇa, for them there are no deficiencies. They are perfect. For this reason Kṛṣṇa gives the instruction,
- tad viddhi praṇipātena
- paripraśnena sevayā
- upadekṣyanti tad jñānaṁ
- jñāninas tattva-darśinaḥ
- (BG 4.34)
One who has actually seen or actually realized the truth, you have to take knowledge from there. So we have to approach such person. Otherwise, if we approach some speculator, we cannot get real knowledge. So those who are speculators, they cannot understand what is God. Therefore they commit mistake that "God is like this," "God like that," "There is no God," "There is no form." All these nonsense things are proposed, because they are imperfect. Bhagavān therefore said, avajānanti māṁ mūḍhā mānuṣīṁ tanum āśritāḥ (BG 9.11). Because He comes for our benefit in the human form, the fools and rascals consider Him as ordinary person. If Bhagavān says, ahaṁ bīja-pradaḥ pitā (BG 14.4), "I am the seed-giving father," so, every one of us, we know that my father is person, his father is person, his father is person, and why the Supreme Person or the supreme father should become imperson? Why? And therefore we have to learn from Bhagavān, the Supreme Person, full knowledge. This Bhagavad-gītā is therefore full knowledge from the full Personality of Godhead. We cannot change even one word in this Bhagavad-gītā. That is folly. So our this Kṛṣṇa consciousness movement is following this principle. We don't manufacture any concocted things. We simply distribute the message given by the Supreme Personality of Godhead. And this is becoming effective practically.