One should avoid hearing from a person not situated in Vaiṣṇava behavior. A Vaiṣṇava is nivṛtta-tṛṣṇa; that is, he has no material purpose, for his only purpose is to preach Kṛṣṇa consciousness. So-called scholars, philosophers and politicians exploit the importance of Bhagavad-gītā by distorting its meaning for their own purposes. Therefore this verse warns that kṛṣṇa-kathā should be recited by a person who is nivṛtta-tṛṣṇa. Śukadeva Gosvāmī epitomizes the proper reciter for Śrīmad-Bhāgavatam, and Parīkṣit Mahārāja, who purposefully left his kingdom and family prior to meeting death, epitomizes the person fit to hear it. A qualified reciter of Śrīmad-Bhāgavatam gives the right medicine (bhavauṣadhi) for the conditioned souls. The Kṛṣṇa consciousness movement is therefore trying to train qualified preachers to recite Śrīmad-Bhāgavatam and Bhagavad-gītā throughout the entire world, so that people in general in all parts of the world may take advantage of this movement and thus be relieved of the threefold miseries of material existence.
(Srimad Bhagavatam----10:1:4----purport).

Anyone who is not Kṛṣṇa conscious and who therefore does not engage in the service of the Lord is also paśu-ghna, for he is willingly drinking poison. Such a person cannot be interested in kṛṣṇa-kathā because he still has a desire for material sense gratification; he is not nivṛtta-tṛṣṇa. As it is said, traivargikās te puruṣā vimukhā hari-medhasaḥ. Those interested in trivarga—that is, in dharma, artha and kāma—are religious for the sake of achieving a material position with which to gain better facilities for sense gratification. Such persons are killing themselves by willingly keeping themselves in the cycle of birth and death. They cannot be interested in Kṛṣṇa consciousness.
(Srimad Bhagavatam----10:1:4----purport).

For kṛṣṇa-kathā, topics about Kṛṣṇa consciousness, there must be a speaker and a hearer, both of whom can be interested in Kṛṣṇa consciousness if they are no longer interested in material topics. One can actually see how this attitude automatically develops in persons who are Kṛṣṇa conscious. Although the devotees of the Kṛṣṇa consciousness movement are quite young men, they no longer read materialistic newspapers, magazines and so on, for they are no longer interested in such topics (nivṛtta-tarṣaiḥ). They completely give up the bodily understanding of life. For topics concerning Uttamaśloka, the Supreme Personality of Godhead, the spiritual master speaks, and the disciple hears with attention. Unless both of them are free from material desires, they cannot be interested in topics of Kṛṣṇa consciousness.
(Srimad Bhagavatam----10:1:4----purport).

"I am seated in everyone's heart, and from Me come remembrance, knowledge and forgetfulness. By all the Vedas, I am to be known; indeed, I am the compiler of Vedānta, and I am the knower of the Vedas." Kṛṣṇa consciousness is so exalted that one who is perfectly situated in Kṛṣṇa consciousness, under the direction of the spiritual master, is fully satisfied by reading kṛṣṇa-kathā as found in Śrīmad-Bhāgavatam, Bhagavad-gītā and similar Vedic literatures. Since merely talking about Kṛṣṇa is so pleasing, we can simply imagine how pleasing it is to render service to Kṛṣṇa.
(Srimad Bhagavatam----10:1:4----purport).

When discourses on kṛṣṇa-kathā take place between a liberated spiritual master and his disciple, others also sometimes take advantage of hearing these topics and also benefit. These topics are the medicine to stop the repetition of birth and death. The cycle of repeated birth and death, by which one takes on different bodies again and again, is called bhava or bhava-roga. If anyone, willingly or unwillingly, hears kṛṣṇa-kathā, his bhava-roga, the disease of birth and death, will certainly stop. Therefore kṛṣṇa-kathā is called bhavauṣadha, the remedy to stop the repetition of birth and death. Karmīs, or persons attached to material sense enjoyment, generally cannot give up their material desires, but kṛṣṇa-kathā is such a potent medicine that if one is induced to hear kṛṣṇa-kīrtana, he will certainly be freed from this disease. A practical example is Dhruva Mahārāja, who at the end of his tapasya was fully satisfied.
(Srimad Bhagavatam----10:1:4----purport).

The entire world is suffering because of spiritual thirst. Every living being is Brahman, or spirit soul, and needs spiritual food to satisfy his hunger and thirst. Unfortunately, however, the world is completely unaware of the nectar of kṛṣṇa-kathā. The Kṛṣṇa consciousness movement is therefore a boon to philosophers, religionists and people in general. There is certainly a charming attraction in Kṛṣṇa and kṛṣṇa-kathā. Therefore the Absolute Truth is called Kṛṣṇa, the most attractive. The word amṛta is also an important reference to the moon, and the word ambuja means "lotus." The pleasing moonshine and pleasing fragrance of the lotus combined to bring pleasure to everyone hearing kṛṣṇa-kathā from the mouth of Śukadeva Gosvāmī.
(Srimad Bhagavatam----10:1:13----purport).

At the present moment, all of human society is engaged in the business of chewing the chewed (punaḥ punaś carvita-carvaṇānām). People are prepared to undergo mṛtyu-saṁsāra-vartmani (B.G.9:3), taking birth in one form, dying, accepting another form and dying again. To stop this repetition of birth and death, kṛṣṇa-kathā, or Kṛṣṇa consciousness, is absolutely necessary. But unless one hears kṛṣṇa-kathā from a realized soul like Śukadeva Gosvāmī, one cannot relish the nectar of kṛṣṇa-kathā, which puts an end to all material fatigue, and enjoy the blissful life of transcendental existence. In relation to the Kṛṣṇa consciousness movement, we actually see that those who have tasted the nectar of kṛṣṇa-kathā lose all material desires, whereas those who cannot understand Kṛṣṇa or kṛṣṇa-kathā regard the Kṛṣṇa conscious life as "brainwashing" and "mind control." While the devotees enjoy spiritual bliss, the nondevotees are surprised that the devotees have forgotten material hankerings.
(Srimad Bhagavatam----10:1:13----purport).

Those who enjoy the activities of Kṛṣṇa are also on the platform of ānanda-cinmaya-rasa; they are liberated from the material platform. When one develops the practice of hearing kṛṣṇa-kathā, he is certainly transcendental to material existence, as confirmed in Bhagavad-gītā (sa guṇān samatītyaitān brahma-bhūyāya kalpate (B.G.14:26). Unless one is on the spiritual platform, one cannot enjoy the transcendental activities of Kṛṣṇa; or in other words, whoever engages in hearing the transcendental activities of Kṛṣṇa is not on the material platform, but on the transcendental, spiritual platform.
(Srimad Bhagavatam----10:7:9----purport).

The word sāra-bhṛtām means paramahaṁsas. The haṁsa, or swan, accepts milk from a mixture of milk and water and rejects the water. Similarly, the nature of persons who have taken to spiritual life and Kṛṣṇa consciousness, understanding Kṛṣṇa to be the life and soul of everyone, is that they cannot give up kṛṣṇa-kathā, or topics about Kṛṣṇa, at any moment. Such paramahaṁsas always see Kṛṣṇa within the core of the heart (santaḥ sadaiva hṛdayeṣu vilokayanti). Kāma (desires), krodha (anger) and bhaya (fear) are always present in the material world, but in the spiritual, or transcendental, world one can use them for Kṛṣṇa. Kāmaṁ kṛṣṇa-karmārpaṇe. The desire of the paramahaṁsas, therefore, is to act always for Kṛṣṇa.
(Srimad Bhagavatam----10:13:2----purport).