Prabhupada's lecture - Śrīmad-Bhāgavatam 1.5.12-13 - New Vrindaban, June 11, 1969
So this press propaganda, this literary propaganda, is required because it is not sentiment. Kṛṣṇa consciousness is not sentiment. It is not that some sentimental people have gathered here and dancing and chanting. No. There is background. There is philosophical background. There is theological understanding. It is not blind or sentimental. So therefore Nārada advises Vyāsadeva that "You are not only fortunate, but you are amogha-dṛk. Your vision is perfect because you are liberated." Amogha. Our vision—we are not perfect. Therefore you'll find in Vedic version, anuśṛṇuyet, anuvarṇayet. Anu. Anu means following. Following. We have to follow the ācāryas. Just like Vyāsadeva. Amogha-dṛk: his vision is without any impediment. There are four kinds of impediments for the conditioned soul. What are those?
That we are subjected to commit error. Any man will commit error because he's conditioned, he'll be illusioned, and he will try to cheat, and his senses are imperfect. These four imperfectness of a conditioned soul. Anywhere, you take any great man, any big man, he has got these four imperfections. Therefore without liberated man, you cannot get real knowledge. Therefore you'll find even the so-called scientists, astrologer, and the astronomer, or... They're studying this nature, "Perhaps," "It might be," because they have no clear vision. And another scientist comes. They changes. But you'll find in the Vedic literature, everything clear.