Prabhupāda: You have to learn from a superior person.
Puṣṭa Kṛṣṇa: But now there is distinction between two types of knowledge. If knowledge means understanding . . .
Prabhupāda: No, no. Any knowledge, if you want to get it, you must receive it from a superior person. That is the law. That I already explained. If you want to steal, if you want to become a thief, you have to learn it from an expert thief. So any knowledge. Knowledge means you have to learn it from superior person. And what to speak of the knowledge of God? That is the ultimate knowledge. Yesterday we were speaking that Kīrtanānanda Mahārāja learned how to make samosās. Now that knowledge is distributed. So every knowledge, you have to learn it from an expert. That is called guru. Guru means expert, heavy—whose knowledge is heavier than your scanty knowledge. You have to learn in this way. Guru means heavy. Therefore Vedic injunction is tad-vijñānārthaṁ sa gurum evābhigacchet (MU 1.2.12). You must. Abhigacchet, this word is used when the sense is "must." Not optional, that I may go or I may not go. No, you must. This is Vedic injunction.
Devotee (2): We can see practically, everyone understands that if they want to be a chemist, they study under another chemist, or a doctor goes to study from some doctor. Why they don't approach a spiritual master for religious knowledge? Why do they think they can do it by themselves?
Prabhupāda: That is their foolishness.
Kīrtanānanda: That idea has been encouraged by rascals.
Prabhupāda: Just like if you want a son, you must have a wife. If one says, "No, without wife, I'll get a son," this is nonsense. Is it possible?
Kulādri: But Śrīla Prabhupāda, without any desire we have been given the heaviest guru. How is that possible?
Prabhupāda: Hmm? Without any desire?
Kulādri: Without our knowing about Kṛṣṇa, having any desire to become Kṛṣṇa conscious, still we have been given the knowledge.
Prabhupāda: I don't follow.