Bob: Without perfect knowledge, can I not teach some things? For example, I may...
Prabhupāda: You can teach up to that, which point you know.
Bob: But should not claim to teach more than I know.
Prabhupāda: Yes, that is cheating.
Yaśodānandana: In other words, you can't teach the truth...
Prabhupāda: Huh?
Yaśodānandana: ...you can't teach the truth with partial knowledge.
Prabhupāda: Yes. That is not possible by any human being. Because any human being, his senses are imperfect. So how he can teach perfect knowledge? Just like you see the sun like a disc. You have no means to approach the sun. If you say, "We can see the sun by telescope and this and that," that is also made by you. And you are imperfect, your instrument is imperfect. Because that telescope you can say that you are seeing, but that machine is made by you, and you are imperfect. How your machine can be perfect? Therefore your knowledge of the sun is imperfect. So you don't teach about sun unless you have got perfect. That is cheating.
Bob: But what about to teach that it is supposed that the sun is 93,000,000 miles away?
Prabhupāda: As soon as you say "it is supposed," it is not scientific.
Bob: Yeah, but I think almost all of science, then, is not scientific. Because all science... (laughter)
Prabhupāda: That is the point.
Bob: Oh, I see. Is based on, you know, suppositions of this or that. So imperfect knowledge may be taught...
Prabhupāda: Huh?
Bob: Imperfect...
Prabhupāda: They're teaching imperfect. Just like they are advertising so much about moon.