Tamāla Kṛṣṇa: "He offers himself to Kṛṣṇa as a disciple. He wants to stop friendly talks. Kṛṣṇa is therefore the original spiritual master in the science of the Bhagavad-gītā, and Arjuna is the original disciple in understanding the Gītā. How Arjuna understands the Bhagavad-gītā is stated in the Gītā itself, and yet foolish mundane scholars explain that one need not submit to Kṛṣṇa as a person but to the unborn within Kṛṣṇa. There is no difference between Kṛṣṇa's within and without, and one who has no sense of this understanding is the greatest fool, the greatest pretender."
"I can find no means to drive away this grief which is drying up my senses. I will not even be able to destroy it if I win an unrivalled kingdom on the earth with sovereignty like that of the demigods in heaven (BG 2.8).
"Sañjaya said: Having spoken thus, Arjuna, chastiser of enemies, told Kṛṣṇa, 'Govinda, I shall not fight,' and fell silent (BG 2.9).
O descendant of Bharata, at that time Kṛṣṇa, smiling in the midst of both the armies, spoke the following words to the grief-stricken Arjuna (BG 2.10)."
Prabhupāda: So Arjuna was so serious, and Kṛṣṇa was smiling. (laughs) "Just see the fool, what he is doing." Therefore there was necessity of instructing Bhagavad-gītā. The fool has to be instructed. Yes. This is the... He was smiling. This is childish. He was very serious, "Oh." Just like sometimes a child is very serious, and the father is smiling. Yes. So now Bhagavad-gītā will be spoken. He has accepted Kṛṣṇa as spiritual master. Now He'll teach. So what does He teach? Next?