So gurūn ahatvā. A devotee of Kṛṣṇa, if need be, if he's unqualified guru... Unqualified guru means who does not know how to guide the disciple. Guru's duty is to guide. So such kind of guru can be at least rejected. That is Jīva Gosvāmī's... Kārya-kāryam ajānataḥ. A guru who does not know what to do and what not to do, but by mistake, by mistakenly I have accepted somebody as guru, he can be rejected. By rejecting him, you can accept an actual bona fide guru. So guru is not killed, but he can be rejected. That is the injunction of the śāstra. So Bhīṣmadeva or Droṇācārya, certainly they were gurus, but Kṛṣṇa indirectly giving indication to Arjuna, that "Although they are in the position of guru, you can reject them." Kārya-kāryam ajānataḥ. "They do not know factually." This Bhīṣmadeva, he materially considered his position. He knew everything from the beginning, that the Pāṇḍavas, they were parentless, fatherless children, and he raised them from the very beginning.