Important instructions about hearing and repeating Krishna Katha from SB canto 3

“But even a person perpetually condemned to the miseries of material existence can get relief from bondage if he simply agrees to hear only kṛṣṇa-kathā. In this Age of Kali, the process of hearing kṛṣṇa-kathā is the most effective means to gain release from unwanted family affection and thus find permanent freedom in life. The Age of Kali is full of sinful reactions, and people are more and more addicted to the qualities of this age, but simply by hearing and chanting of kṛṣṇa-kathā one is sure to go back to Godhead. Therefore, people should be trained to hear only kṛṣṇa-kathā — by all means — in order to get relief from all miseries.” SB 3.5.44 purport

“O Lord, persons who, because of their serious attitude, attain the stage of enlightened devotional service achieve the complete meaning of renunciation and knowledge and attain the Vaikuṇṭhaloka in the spiritual sky simply by drinking the nectar of Your topics.” SB 3.5.46 verse

If we are properly engaged in bhakti yoga, we should be happy:
“The devotees derive more transcendental pleasure while engaged continuously in the service of the Lord than when they have no such engagement.” SB 3.5.47 purport
“Maitreya’s statement is that in order to avoid unchaste conscious activities, he was trying to describe the unlimited glories of the Lord, although he did not have the ability to describe them perfectly. This glorification of the Lord is not a product of research, but the result of hearing submissively from the authority of the spiritual master. It is also not possible to repeat all that one has heard from his spiritual master, but one can narrate as far as possible by one’s honest endeavor. It does not matter whether the Lord’s glories are fully explained or not. One must attempt to engage one’s bodily, mental and verbal activities in the transcendental glorification of the Lord; otherwise such activities will remain unchaste and impure. The existence of the conditioned soul can be purified only by the method of engaging mind and speech in the service of the Lord.” SB 3.6.36 purport

Devotees experience transcendental joy by engaging in Krishna katha: “The answer is that the transcendental ecstasy enjoyed by the devotees in delineating the pastimes of the Lord is certainly unknown to nondevotees and mental speculators. Unless one relishes transcendental joy, naturally one will come back from his speculations and concocted conclusions because he will see them as neither factual nor enjoyable.” SB 3.6.40 purport

AB 3.7. 20: Translation:
Persons whose austerity is meager can hardly obtain the service of the pure devotees who are progressing on the path back to the kingdom of Godhead, the Vaikuṇṭhas. Pure devotees engage one hundred percent in glorifying the Supreme Lord, who is the Lord of the demigods and the controller of all living entities.
Purport:
The path of liberation, as recommended by all authorities, is to serve the mahātmā transcendentalists. As far asBhagavad-gītā is concerned, the mahātmās are the pure devotees who are on the path to Vaikuṇṭha, the kingdom of God, and who always chant and hear the glories of the Lord rather than talk of dry, profitless philosophy. This system of association has been recommended since time immemorial, but in this age of quarrel and hypocrisy it is especially recommended by Lord Śrī Caitanya Mahāprabhu. Even if one has no assets of favorable austerity, if he nevertheless takes shelter of the mahātmās, who are engaged in chanting and hearing the glories of the Lord, he is sure to make progress on the path back home, back to Godhead.

“In other words, unless one hears from the proper authority one cannot become a preacher. In devotional service, therefore, two items out of the nine, namely hearing and chanting, are most important. Without hearing nicely, one cannot preach the message of Vedic knowledge.” sb 3.8.7 purport