Kṛṣṇa is not different from within and without. Kṛṣṇa, being Absolute, there is no such difference. As we have got difference, I, the spirit soul, is different from my body, but Kṛṣṇa is not like that. There is no such difference that Kṛṣṇa's soul and Kṛṣṇa's body. Kṛṣṇa is complete whole, pūrṇa. There is no such difference. The person who does not know what is Kṛṣṇa, if he tries to comment upon the transcendental knowledge imparted by Kṛṣṇa, that is simply impudent. So in this way, if we try to understand Bhagavad-gītā as it is, then we become liberated, we become a devotee of Kṛṣṇa, we become fully Kṛṣṇa conscious. That is the objective of Bhagavad-gītā. Kṛṣṇa therefore says, "Arjuna, I am trying to deliver this knowledge of Bhagavad-gītā unto you because you are My devotee." Bhakto 'si priyo 'si me rahasyaṁ hy etad uttamam (BG 4.3). "Without you, nobody can understand what is the mystery of this Bhagavad-gītā knowledge."
Therefore we should understand that Bhagavad-gītā is meant for a person who is a devotee and dear to Kṛṣṇa, not for the demons, who are against Kṛṣṇa. The demons are trying to kill Kṛṣṇa. Just like Kaṁsa: his only business is making plan how to kill Kṛṣṇa. Just like Rāvaṇa: his only business is how to kill Lord Rāma. So there are two classes of men. One class of men is called demigod, devatā, and the other class is called demon. And who is demon and who is devatā? Viṣṇu-bhakto bhaved deva āsuras tad-viparyayaḥ. One who is devotee of Lord Viṣṇu, he is called deva, demigod. All the demigods like Sūrya, Candra, Indra, and many others, they are all appointed servants of Kṛṣṇa. In the Caitanya-caritāmṛta, therefore, it is said,
- ekale īśvara kṛṣṇa āra saba bhṛtya
- yāre yaiche nācāya se taiche kare nṛtya
- (CC Adi 5.142)
Very simple language: "The only master, only īśvara, parameśvara, is Kṛṣṇa." That is confirmed in the Brahma-saṁhitā also:
- īśvaraḥ paramaḥ kṛṣṇaḥ
- sac-cid-ānanda-vigrahaḥ
- anādir ādir govindaḥ
- sarva-kāraṇa-kāraṇam
- (Bs. 5.1)
In the Śrīmad-Bhāgavatam also it is confirmed, ete cāṁśa-kalāḥ puṁsaḥ kṛṣṇas tu bhagavān svayam (SB 1.3.28). Even Śaṅkarācārya, whom we call impersonalist, he has accepted in his comment on Bhagavad-gītā that "Kṛṣṇa is the Supreme Personality of Godhead appearing as the son of Devakī and Vasudeva."