Why this ignorance of Arjuna, the question may be. Arjuna is guḍākeśa. He is above this material world. How he is being affected by his so-called relatives and kinsmen? He was hesitating to fight on this principle that, "They are my relatives. They are my kinsmen. They are my family members." He was always thinking. Therefore Kṛṣṇa knew it. So he has become so family-wise infected. But he is guḍākeśa. How it is possible? He is above all these things. Yes, he is above all these things. By Kṛṣṇa's desire, he is playing like that, ordinary man. Otherwise, how Bhagavad-gītā will come? Kṛṣṇa cannot talk with ordinary person. Kṛṣṇa cannot fight with ordinary person.
Even the demons, when they come . . . just like Hiraṇyākṣa, Hiraṇyakaśipu. They were Jaya-Vijaya in the Vaikuṇṭha world. So they came here, and Kṛṣṇa asked them that, "If you become My enemy, then within three births you will come back. And if you remain friend, then seven births." So they preferred, "Oh, I shall become Your enemy, Sir, so that I can come back again after three births." So why? The Kṛṣṇa has all the propensities. Just like we sometimes want to fight, mock fight. So in the Vaikuṇṭha world there cannot be any fight. So because Kṛṣṇa wanted to exercise His fighting spirit, He sent His devotee. He became enemy and He fought.
So you have to understand Kṛṣṇa in that way, as Hṛṣīkeśa. He knows that unless Arjuna becomes affected family-wise, how Bhagavad-gītā will be there? Therefore although Guḍākeśa, Arjuna, is above darkness, still, by the will of Kṛṣṇa, Hṛṣīkeśa, he played just like ordinary man, affected with his family affection.
Therefore Kṛṣṇa in the next verse says . . . uvāca. Kṛṣṇa said: "My dear Pārtha, now you wanted to see with whom you have to fight. Now here is Bhīṣma, Droṇa and many other kings, all the descendants of Kuru dynasty, your Dhṛtarāṣṭra's sons. Now you see very nicely and be prepared to fight with them." So this is the explanation of Hṛṣīkeśa and Guḍākeśa.