One who is thinking of this body as identified with the self, he is animal. Anyone, it doesn't matter. We do not speak of any particular man, but any person who does not know his real identification... As Sanātana Gosvāmī inquired, ke āmi. He was the prime minister, but still, he did not know what he is. That will be explained. Grāmya-vyavahāre kahaye paṇḍita satya kare māni āpanāra hitāhita kichui nā jāni. "Some foolish person, they say that I am very learned scholar." Because he was brāhmaṇa. Brāhmaṇa is always supposed to be very learned; therefore he is called paṇḍita, paṇḍitajī. So Sanātana Gosvāmī said, grāmye-vyavahāre: "In ordinary dealings my neighborhood men, they say 'Paṇḍitajī.' But I am such a paṇḍita that I do not know what I am." Āpanāra hitāhita kichui nā jāni: "I am such a paṇḍita. Therefore I have come to You." This is called submission. If one is sincere... If he does not know what he is, what is his function, how he will make his life successful, then he is not paṇḍita. So that is going on now, at the present moment, throughout the whole world, the bodily concept of life—"I am American," "I am Indian," "I am African," "I am this," "I am that," "I am brāhmaṇa," "I am śūdra," "I am black," "I am white"—this bodily concept of life. So śāstra says that "If anyone is in the bodily conception of life," sa eva go-kharaḥ (SB 10.84.13), "he is no better than these animals."
So therefore Sanātana Gosvāmī is the best example to follow, how one should approach a guru, how one should take lesson from guru, how he should understand to make his life successful. These questions or answers are there in the Sanātana-śikṣā of Caitanya-caritāmṛta.