So Arjuna and Kṛṣṇa, they were friends, but still, to take right instruction without any argument, he accepted He is guru. Then after the acceptance Kṛṣṇa's first warning is,
- aśocyān anvaśocas tvaṁ
- prajñā-vādāṁś ca bhāṣase
- gatāsūn agatāsūṁś ca
- nānuśocanti paṇḍitāḥ
- (BG 2.11)
"My dear Arjuna, you are talking like a very learned man, but the subject matter which you have touched is not at all taken seriously by the paṇḍita." Paṇḍita means learned man. That means, "You are talking like a fool. You are taking this body as self."
So actually this is not the fact. The body is not the self. The self is different. If you analyze this body, what you will find? Suppose we are breathing. What is this breathing? It is air only. Now, when the breathing is stopped, a man is dead. Now you are so much advanced in science, why don't you replace this breathing? It is nothing but air. So you can manufacture some machine working in electric battery, and put some air and fix up, and that same air will come: woosh, woosh, woosh, woosh. Will that give you life? No. Even if you artificially bring breathing, just like nowadays they, with oxygen gas, as if oxygen gas is life . . . That is not the fact.
So if you analyze every part of the body, then you will find that there is no life. This is called education. This is called scientific knowledge. Simply abruptly taking something without any proper understanding, that is not knowledge. Therefore Kṛṣṇa chastised him that "You are talking like very scientific, learned scholar, but you are a fool number one because you are accepting this material body as the self." This is ignorance.