But the highest, highest perfection of knowledge is, so far we study from the Bhagavad-gītā, it is said, bahūnāṁ janmanām ante jñānavān māṁ prapadyate (BG 7.19). Bahūnāṁ janmanām ante. Bahūnām means after many, many births of culturing knowledge, when he comes to the real knowledge, real, perfect knowledge. Bahūnāṁ janmanām ante jñānavān. Not the fools, but jñānavān. He especially mentions jñānavān. Jñānavān māṁ prapadyate. Jñānavān the sign is that jñānavān surrenders unto the Supreme Lord Kṛṣṇa. That is the highest stage of knowledge.
Either you take it, granted... Just like Arjuna was advised by Kṛṣṇa, sarva-dharmān parityajya mām ekaṁ śaraṇaṁ vraja: (BG 18.66) "You give up. Because you are My very confidential friend, therefore I say unto you that you don't bother with anything else. Just surrender unto Me." This is the most confidential. So in all points of view, if you make an analytical study of the Vedic literature, the ultimate summit knowledge is to surrender unto Kṛṣṇa.