Prabhupāda: Imperfect senses can give imperfect knowledge. That is not scientific knowledge. What you are thinking scientific knowledge, that is bogus, because the man who has given that knowledge, he's imperfect. How you can expect perfect knowledge from the imperfect person?
Guest: It's a question of degree.
Prabhupāda: Now, degree may be, but ultimately, if you are unable to give perfect knowledge, then what is the use of taking knowledge from you?
Guest: Yes, I accept that view. But how do you prove that a man . . .?
Prabhupāda: Yes, therefore you take from the perfect, Kṛṣṇa. We take from Kṛṣṇa's representative—one who speaks as good as Kṛṣṇa. That is our process. Evaṁ paramparā-prāptam imaṁ rājarṣayo viduḥ (BG 4.2). We don't take, don't accept knowledge from any rascal. We accept knowledge from Kṛṣṇa, the Supreme. I may be rascal, but because I am receiving knowledge from the perfect, whatever we speak, that is perfect. A child may be innocent; he does not know. But he has learned that this article is called spectacle. So when he says, the child says: "Father, this is spectacle," this is perfect knowledge. Similarly, if you hear from the perfect and act accordingly, then you are perfect. Now Kṛṣṇa says, tathā dehāntara-prāptiḥ (BG 2.13). Tathā dehāntara-prāptiḥ: after death there is another body. So we accept it. It doesn't require any proof of so-called science, who's imperfect.