So Brahmā is mahājana. You'll find Brahmā's picture with Veda in his hand. So he's the . . . he gave the first instruction of Veda. But wherefrom he got the Vedic knowledge? Therefore Vedic knowledge is apauruṣeya. It is not man-made; it is God-made. dharmaṁ tu sākṣād bhagavat-praṇītam (SB 6.3.19). So how God, Kṛṣṇa, gave to Brahmā? Tene brahma hṛdā. Brahma, brahma means the Vedic knowledge. Śabda-brahma. Tene. He injected Vedic knowledge from hṛdā. Teṣāṁ satata-yuktānāṁ bhajatāṁ pritī-pūrvakam (BG 10.10).
When Brahmā was created, he was perplexed: "What is my duty? Everything is dark." So he meditated, and Kṛṣṇa gave him knowledge, that "Your duty is this. You do like this." Tene brahma hṛdā ya ādi-kavaye. Ādi-kavaye (SB 1.1.1). Brahmā is ādi-kavaye. So actual guru is Kṛṣṇa. And here is . . . Kṛṣṇa is advising the Bhagavad-gītā. These rascals and fools will not accept Kṛṣṇa as guru. They'll go to some rascal and fool and miscreants, sinful person, and accept guru. How he can be guru? So guru is Kṛṣṇa.
Here is the example given by Arjuna. Pṛcchāmi tvām. Who is that tvām? Kṛṣṇa. "Why you are asking Me?" dharma-sammūḍha-cetāḥ (BG 2.7). "I am bewildered in my duties, dharma." dharma means duty. dharmaṁ tu sākṣād bhagavat-praṇītam (SB 6.3.19). Sammūḍha-cetāḥ. "So what I have to do?" Yac chreyaḥ. "What is actually my duty?" Śreyaḥ. Śreyaḥ and preyaḥ. Preyaḥ . . . they are two things. Preya means which I like immediately, very nice. And śreya means ultimate goal. They are two things. Just like a child wants to play all day. That is childish nature. That is śreya.