Therefore, when our other senses cannot work, our ear is very strong. Therefore it is recommended that you try to hear from the authoritative person. That is also... Educational system is also like that. Why do you come to university, school, and college? To hear from an experienced professor. He knows, and you acquire the knowledge by hearing.
So the process of hearing is very important. So our this Kṛṣṇa consciousness movement is to propagate that "You hear from the authority, Kṛṣṇa." Kṛṣṇa is the Supreme Personality of Godhead. It is accepted in the present age and in the past age. In the past age, great sages like Nārada, Vyāsa, Asita, Devala, very, very great stalwart scholars and sages, they accepted. In the Middle Age, say 1,500 years ago, all the ācāryas like Śaṅkarācārya, Rāmānujācārya, Madhvācārya, Nimbārka... Practically, Indian Vedic civilization, it is still existing on the authority of these ācāryas. And it is recommended in the Bhagavad-gītā: ācāryopāsanam. If you want to learn factually things, then you should approach ācārya. Ācāryavān puruṣo veda, "One who has accepted ācārya, he knows things as they are." Ācāryavān puruṣo veda. So we are receiving knowledge through the ācāryas. Kṛṣṇa spoke to Arjuna, Arjuna spoke to Vyāsadeva. Arjuna actually did not speak to Vyāsadeva, but Vyāsadeva heard it, Kṛṣṇa speaking, and he noted down in his book Mahābhārata. This Bhagavad-gītā is found in Mahābhārata. So we accept the authorities of Vyāsa. And from Vyāsa, Madhvācārya; from Madhvācārya, so many disciplic succession, up to Mādhavendra Purī. Then Mādhavendra Purī to Īśvara Purī; from Īśvara Purī to Lord Caitanyadeva; from Lord Caitanyadeva to six Gosvāmīs; from six Gosvāmīs to Kṛṣṇadāsa Kavirāja; from him, Śrīnivāsa Ācārya; from him, Viśvanātha Cakravartī; from him, Jagannātha dāsa Bābājī; then Gaura Kiśora dāsa Bābājī; Bhaktivinoda Ṭhākura; my spiritual master. The same thing, we are preaching. That is Kṛṣṇa consciousness movement. It is nothing new. It is coming down from the original speaker, Kṛṣṇa, by disciplic succession. So we are reading this Bhagavad-gītā. Not that I have manufactured some book and I am preaching. No. I am preaching Bhagavad-gītā. The same Bhagavad-gītā as it was first spoken forty millions of years ago to the sun-god and again it was repeated five thousand years ago to Arjuna. The same thing is coming down by disciplic succession, and the same thing is presented before you. There is no change.