Prabhupāda: What they are doing there? Something aimless. (some noise of people yelling a distance away) (break) ...because frogs never come to the... You will never find a frog in the ocean. Did you mark it?
Brahmānanda: No.
Prabhupāda: You have got so many animals but never a frog.
Svarūpa Dāmodara: Maybe they don't like the salt.
Prabhupāda: Whatever it may be, frog is conspicuous by absence. There is no frog. Therefore that example is given. They have never seen what is the ocean. (laughs) So all these scientists, they are frogs. They have never seen what is the kingdom of God. Therefore this example, "Doctor Frog." Doctor frog is never visible in the ocean. They are visible only within this circle, well. That's all.
Svarūpa Dāmodara: This example is available in Bhāgavatam, Prabhupāda.
Prabhupāda: Yes, in nyāya-śāstra. Kūpa-maṇḍūka-nyāya. Kūpa means well, and maṇḍūka means frog. "The frog in the well." The frogs, sometimes they are in river also, in bank of the rivers. But never in the ocean.
Svarūpa Dāmodara: The environment is not suitable. They are fresh water species.
Prabhupāda: Well, they are also aquatics. They also live in water. But they are unfit for living in ocean water. So many varieties of life, different living entities meant for different purposes.
Svarūpa Dāmodara: According to the desire of the...
Prabhupāda: According to the desire of the living entity. All facilities, whatever you want, you can have. Harer nāma harer nāma harer nāma eva kevalam (CC Adi 17.21). Another logic is bakāṇḍa-nyāya. Bakāṇḍa. Baka and aṇḍa. Baka, the duck. And aṇḍa, the testicle, testicle of the bull. The bull is going and the testicle is hanging, and the duck is after it. He is thinking here is a fish. You find him always going...when it will drop. Bakāṇḍa. This is nature's study. (break) The baka, the duck, they are after fish. So the testicle is hanging, he's thinking it's a big fish, it will drop now. So it will never drop but he is going after it. Just see. Neither it is fish. Another logic is āja-gala-stana, āja-gala-stana. You have seen on the goats in the neck, just like nipples. If one is expecting milk from that nipple, he is also fool. It is not nipple but it looks like nipple. Āja-gala-stana-nyāya.
Svarūpa Dāmodara: It is like the mirage in the desert.
Prabhupāda: Yes, illusion, these are illusions. Āja-gala-stana-nyāya is applied for these rascals, those who are thinking that from matter life is coming. Exactly the same. They are thinking that here are nipples, there will milk come. Let us milk here.
Brahmānanda: But they are not getting, they are saying maybe in the future.
Prabhupāda: Yes, in future, yes. (laughter) In Sanskrit logic all these examples are there from nature's study.