Those who are addicted to commit sins, they are all mūḍhas. They do not know. So therefore, because they are mūḍhas and because they are duṣkṛtina, they cannot understand Kṛṣṇa. The mūḍhas and the duṣkṛtinas, sinful men, they cannot understand. Therefore you'll find generally those who are too much lowborn, without any knowledge, without any pious activities, they are all atheist, godless. They cannot understand. How they will understand? Because they are mūḍhas, narādhama. Narādhama means this life, human life, is an opportunity to understand how things are going on. But they do not take advantage. Narādhama, lowest of the mankind. No? Then you go to the learned, learned māyayāpahṛta-jñānāḥ, the so-called learned B.A.C., D.H.C., P.H.C., what is their learning? Simply the same thing, āhāra-nidrā-bhaya-maithuna: how to eat, how to sleep. Their learning, their education, is meant for how to eat, how to sleep. That's all. So that is also dog's business. Māyayāpahṛta-jñānāḥ (BG 7.15).
Real knowledge is, education is, how things are going on within this nature. Janmādy asya yataḥ (SB 1.1.1). So they are not interested in these things. Education means, "How to get one service so that I can get salary and I may live very comfortably, and my wife, my children . . ." The same thing, dog's business.