Pradyumna: "If the ear is not engaged in the service of the Lord by hearing about Him in the Bhagavad-gītā or in the Śrīmad Bhāgavatam, certainly the holes of the ear will be filled up with some rubbish."
Prabhupāda: Yes. This is the secret. We have got the ears, and we have got the sound also. Just like we are reading this book. So if we don't fill up our ears with this transcendental sound, then it will be filled up with some rubbish things. It cannot remain empty. Either you fill up with transcendental message, or you fill up with rubbish nonsense. Two ways. So if you take care that your earholes are always filled up with the transcendental message of Kṛṣṇa, so there is no scope for rubbish things to enter into it. So therefore our attempt should be twenty-four hours hearing. Kīrtanīyaḥ sadā hariḥ (CC Adi 17.31). Twenty-four hours. As soon as you get time, read books, discuss amongst yourself . . . (indistinct) . . . don't fill up the ears with rubbish things. Then advance will be choked up.
Go on.
Pradyumna: "Therefore the messages of the Bhagavad-gītā and the Śrīmad Bhāgavatam should be preached all over the world very loudly. That is the duty of a pure devotee who has actually heard about them from the perfect sources. Many may want to speak something to others, but because they are not trained up to speak on the subject matter of Vedic wisdom, they are all speaking nonsense, and the people are receiving them with no sense."
"There are hundreds and thousands of sources for distributing mundane news of the world, and people of the word are also receiving them. Similarly, the people of the world should be taught to hear the transcendental topics of the Lord, and the devotee of the Lord must speak loudly so that they can hear. The frogs loudly croak, with the result that they invite the snakes to eat them. The human tongue is especially meant for chanting the Vedic hymns and not for croaking like the frogs."
"The word asatī used in this verse is also significant. Asatī means a woman who has become a prostitute. A prostitute has no reputation for good womanly qualities. Similarly, the tongue, which is given to the human being for chanting the Vedic hymns, will be considered a prostitute when it is engaged in the matter of chanting some mundane nonsense."
Prabhupāda: Yes. Just like a chaste woman has got good reputation, similarly, a chaste tongue . . . chaste tongue means . . . chaste tongue and ear. Jihvādau. Our spiritual life begins from tongue. Jihvādau. Sevonmukhe hi jihvādau svayam eva sphuraty adaḥ. Ataḥ śrī-kṛṣṇa-nāmādi na bhaved grāhyam indriyaiḥ (CC Madhya 17.136). These senses—these mundane, blunt senses—they cannot receive or understand what is Kṛṣṇa, what is Kṛṣṇa's name, what is Kṛṣṇa's form, what is Kṛṣṇa's pastimes, what is Kṛṣṇa's paraphernalia—so many things Kṛṣṇa's . . . what is Kṛṣṇa's word. Na bhaved grāhyam indriyaiḥ. These senses cannot do it.
But when the one sense, the tongue, is engaged in devotional service . . . the tongue is engaged in devotional service means chant Hare Kṛṣṇa. This tongue is especially given to you. The dog, the cat cannot chant Hare Kṛṣṇa, but you can, because God has given you the opportunity. So just like chaste woman means he (she) is meant for her husband, similarly, chaste tongue means which is meant for chanting Hare Kṛṣṇa. That is chaste tongue. And tasting kṛṣṇa-prasādam.
So if you can simply engage your tongue chanting Hare Kṛṣṇa and tasting kṛṣṇa-prasādam, you become perfect. Simple thing. There is no difficulty. Whenever there is time, chant Hare Kṛṣṇa. And when you feel hungry, take kṛṣṇa-prasādam and live here peacefully. Don't talk rubbish. Then life is successful. Is there any difficulty? We are, we are trying to give you kṛṣṇa-prasādam. We are giving you chance to chant Hare Kṛṣṇa. That is our duty.
So you take advantage of it, and make your life successful. Otherwise, it is jihvāsatī dārdurikeva sūta. Dārdurikā. The frogs, frog's tongue, very busy in croaking. But it, it, it is means inviting death: "Please come here. I am sitting here." So similarly, by talking nonsense we allow our span of life being diminished by the sunrise and sunset, but if we talk about the urugāya-gāthāḥ, the Supreme Personality of Godhead, then our life cannot be taken away. It cannot be decreased. It will be eternal. Simply by doing these two things . . . sevonmukhe hi jihvādau (Brs. 1.2.234). If we simply engage the jihvā, the tongue, in the transcendental loving service of the Lord, then we can see God, eye to eye. Then? You read one verse more.