Bhīṣma thought that "I am maintained by the money of Duryodhana. Duryodhana is maintaining me. Now he is in danger. If I go to the other side, then I should be ungrateful. He has maintained me so long. And if I, in the time of danger, when there is fighting, if I go to the other side, that will be..." He thought like this. He did not think that "Duryodhana may be maintaining, but he has usurped the property of the Pāṇḍavas." But it is his greatness. He knew that Arjuna will never be killed because Kṛṣṇa is there. "So from material point of view, I must be grateful to Duryodhana." The same position was for Droṇācārya. They were maintained.
Therefore Caitanya Mahāprabhu has said that viṣayīra anna khāile malīna haya mana (CC Antya 6.278). Such great personalities became darkened because they took money from them, anna. If I am provided by somebody who is too much materialist, then that will affect me. I will become also materialist. I will also become materialist. So Caitanya Mahāprabhu has warned that "Those who are viṣayī, those who are not devotees, do not accept anything from them because it will make your mind unclean." So therefore a brāhmaṇa and a Vaiṣṇava, they do not accept directly money. They accept bhikṣā. Bhikṣā. Just like here it is said bhaikṣyam. Śreyo bhoktuṁ bhaikṣyam apīha loke (BG 2.5). When you ask somebody... Still, bhikṣā is also sometimes prohibited from a person who is too much materialist. But bhikṣā is allowed for sannyāsīs, for brāhmaṇa. So therefore Arjuna is speaking that "Instead of killing such great gurus who are so great personalities, mahānubhāvān..." So bhaikṣyam. For a kṣatriya... A brāhmaṇa, a sannyāsī can beg, can beg alms, but not a kṣatriya, not a vaiśya. That is not allowed. So he was a kṣatriya, Arjuna. So he says, "Better I shall take the profession of a brāhmaṇa and beg from door to door instead of enjoy the kingdom by killing my guru." That was his proposal. So on the whole, Arjuna is illusioned—illusioned in the sense that he is forgetting his duty. He is a kṣatriya, his duty is to fight; never mind the opposite party, even he is son, a kṣatriya will not hesitate to kill his son even if he is inimical. Similarly, the son, if the father is inimical, he would not hesitate to kill his father. This is the stringent duty of the kṣatriyas, no consideration. A kṣatriya cannot consider like that. Therefore Kṛṣṇa said, klaibyam: "You don't be coward. Why you are becoming coward?" These topics are going on. Later on, Kṛṣṇa will give him real spiritual instruction. This is... Ordinary talks are going on between the friend and the friend.