(Prabhupada's lecture - Śrīmad-Bhāgavatam 1.15.49 - Los Angeles, December 26, 1973)
So we have become so rascal that we do not believe in the transmigration of the soul. Actually, I am...Presently I can understand that "I had such and such body; now I have transmigrated to this body." How I have done, that is not known to you or me. That is called acintya. Perceptive. Just like the child is changing body, and you saw one child on the lap of his mother. So after few years, you come. You cannot recognize the same child who has grown up: "Oh." The mother says that "This is such and such." "Oh, you have become so grown up." So things are taken imperceptibly. That is going on by the subtle laws of nature. It is a great science, but there is no discussion of this science in any university of the whole world. And they are advancement of knowledge. They are claiming advancement of knowledge. What knowledge you have got? You do not know what you are, and you are advancement in knowledge.
Therefore Sanātana Gosvāmī, who was prime minister of Nawab Hussein Shah, when he approached Caitanya Mahāprabhu, his first proposition was that, grāmya-vyavahāre paṇḍita, tāi satya māni: "My dear Sir, Caitanya Mahāprabhu, some neighboring people, they call me, I am a very learned scholar." Grāmya-vyavahāre. "In ordinary behavior, they call me, I am very learned scholar. But I do not know what I am, I am such a scholar." This is the submission. This is called submission. Everyone is puffed up, that "I know. I know everything. So there is no need of going to a guru." This is the method to approach a guru, spiritual master: surrender, that "I know so many rubbish things which are useless. Now kindly teach me." This is called submission. Just like Arjuna said, śiṣyas te 'haṁ śādhi māṁ prapannam [Bg. 2.7]. When there was argument between Arjuna and Kṛṣṇa, and when the matter was not solved, then Arjuna submitted to Kṛṣṇa, "My dear Kṛṣṇa, now we are talking as friends. No more friendly talking. I accept You as my spiritual master. Kindly teach me what is my duty." That is Bhagavad-gītā.