Rūpānuga: Śarīram puruṣo veda.(?)
Prabhupāda: Yes. Knowledge is through śāstra, authority, not by our senses. That is not knowledge.
Svarūpa Dāmodara: So that explains the... Sometimes some scientists ask that "You are very sure, so sure about the 8,400,000 species."
Prabhupāda: Hmm?
Svarūpa Dāmodara: They ask, "How are you so much sure about 8,400,000 species?"
Prabhupāda: Because we have heard from authority. As you are asking assurance from me, so I give you the knowledge from where I have heard. You want to hear from me. I have heard from authority. That's all. What is the difficulty? Why you are asking me? You want to hear from me. So I have also heard from authority. This is the statement. You take it.
Svarūpa Dāmodara: So when... They say that there are some plants that can grow from just branches... We stick the branch in the soil. Then it just grows to another plant.
Prabhupāda: The same thing. The living entity is there, but he is manifested in such a way. The same explanation. Just like there are many living entities within my body, and when this body is stopped, decomposed, they come out in different forms.
Svarūpa Dāmodara: Are these living entities constant? They don't change any.
Prabhupāda: Yes, nitya, nitya. Nityaḥ śāśvato 'yaṁ na hanyate hanyamāne śarīre (BG 2.20). Why don't you see these references? It is never created. It is ever-existing, eternal. Only it appears to be temporary on account of accepting different material bodies. Therefore, paṇḍitāḥ sama-darśinaḥ (BG 5.18). One who knows, he knows that he has changed his body, the same person. Just like father, mother knows. When a son becomes very stout and strong, the mother sees that same child. Others may be bewildered. One who has seen the child very long ago, now he has become robust build. He cannot say. And the mother says, "He is my child, that child." So paṇḍitāḥ sama-darśinaḥ (BG 5.18).