The neophytes, due to their being in the lower stage of devotional service, are invariably envious, so much so that they invent their own ways and means of devotional regulations without following the ācāryas. As such, even if they make a show of constantly chanting the holy name of the Lord, they cannot relish the transcendental taste of the holy name. Therefore, the show of tears in the eyes, trembling, perspiration or unconsciousness, etc., is condemned. They can, however, get in touch with a pure devotee of the Lord and rectify their bad habits; otherwise they shall continue to be stonehearted and unfit for any treatment. A complete progressive march on the return path home, back to Godhead, will depend on the instructions of the revealed scriptures directed by a realized devotee.
(Srimad Bhagavatam-----2:3:24-----purport).

Dhruva Mahārāja's becoming angry with the miscreants was quite appropriate. There is a short story in this connection about a snake who became a devotee upon instruction by Nārada, who instructed him not to bite anymore. Since ordinarily a snake's business is to fatally bite other living entities, as a devotee he was forbidden to do so. Unfortunately, people took advantage of this nonviolence on the part of the snake, especially the children, who began to throw stones at him. He did not bite anyone, however, because it was the instruction of his spiritual master. After a while, when the snake met his spiritual master, Nārada, he complained, "I have given up the bad habit of biting innocent living entities, but they are mistreating me by throwing stones at me." Upon hearing this, Nārada Muni instructed him, "Don't bite, but do not forget to expand your hood as if you were going to bite. Then they will go away." Similarly, a devotee is always nonviolent; he is qualified with all good characteristics. But, in the common world, when there is mischief made by others, he should not forget to become angry, at least for the time being, in order to drive away the miscreants.
(Srimad Bhagavatam-----4:11:31-----purport).

This is the mentality of one who is becoming a pure devotee. When one is elevated to the platform of devotional service by the grace of the Lord and the spiritual master, one first regrets his past sinful activities. This helps one advance in spiritual life. The Viṣṇudūtas had given Ajāmila the chance to become a pure devotee, and the duty of a pure devotee is to regret his past sinful activities in illicit sex, intoxication, meat-eating and gambling. Not only should one give up his past bad habits, but he must always regret his past sinful acts. This is the standard of pure devotion.
(Srimad Bhagavatam-----6:2:27-----purport).

Many so-called svāmīs and yogīs give up material activities as false (jagan mithyā), but after some time they nevertheless resume material activities by opening hospitals and schools or performing other activities for the benefit of the public. Sometimes they participate in politics, although still falsely declaring themselves sannyāsīs, members of the renounced order. The perfect conclusion, however, is that if one actually desires to get out of the material world, he must take to devotional service, which begins with śravaṇaṁ kīrtanaṁ viṣṇoḥ: (S.B.7:5:23) chanting and hearing the glories of the Lord. The Kṛṣṇa consciousness movement has actually proved this. In the Western countries, many young boys who were addicted to drugs and who had many other bad habits, which they could not give up, abandoned all those propensities and very seriously engaged in chanting the glories of the Lord as soon as they joined the Kṛṣṇa consciousness movement. In other words, this process is the perfect method of atonement for actions performed in rajaḥ and tamaḥ (passion and ignorance).
(Srimad Bhagavatam-----6:2:46-----purport).

If a young man immediately adopts the path of the renounced order in accordance with the instructions of Nārada or a member of his disciplic succession, his parents become very angry. This same phenomenon is occurring in our Kṛṣṇa consciousness movement because we are instructing all the young boys in the Western countries to follow the path of renunciation. We allow gṛhastha life, but a gṛhastha also follows the path of renunciation. Even a gṛhastha has to give up so many bad habits that his parents think his life has been practically destroyed. We allow no meat-eating, no illicit sex, no gambling and no intoxication, and consequently the parents wonder how, if there are so many no's, one's life can be positive. In the Western countries especially, these four prohibited activities practically constitute the life and soul of the modern population. Therefore parents sometimes dislike our movement, just as Prajāpati Dakṣa disliked the activities of Nārada and accused Nārada of dishonesty.
(Srimad Bhagavatam-----6:5:36-----purport).

The process of transcendental chanting can be easily performed by anyone. Even if one is physically unfit, classified lower than others, devoid of material qualifications or not at all elevated in terms of pious activities, the chanting of the holy name is beneficial. An aristocratic birth, an advanced education, beautiful bodily features, wealth and similar results of pious activities are all unnecessary for advancement in spiritual life, for one can very easily advance simply by chanting the holy name. It is understood from the authoritative source of Vedic literature that especially in this age, Kali-yuga, people are generally short-living, extremely bad in their habits, and inclined to accept methods of devotional service that are not bona fide. Moreover, they are always disturbed by material conditions, and they are mostly unfortunate. Under the circumstances, the performance of other processes, such as yajña, dāna, tapaḥ and kriyā—sacrifices, charity and so on—are not at all possible.
(Srimad Bhagavatam-----7:5;23-24-----purport).

Factually speaking, even those who are situated in the material mode of goodness cannot understand the position of the Supreme Personality of Godhead. What then is to be said of those who are situated in rajo-guṇa and tamo-guṇa, the base qualities of material nature? How can we even imagine the Supreme Personality of Godhead? There are so many philosophers trying to understand the Absolute Truth, but since they are situated in the base qualities of material nature and are addicted to so many bad habits, like drinking, meat-eating, illicit sex and gambling, how can they conceive of the Supreme Personality of Godhead? For them it is impossible. For the present day, the pāñcarātrikī-vidhi as enunciated by Nārada Muni is the only hope. Śrīla Rūpa Gosvāmī, therefore, has quoted the following verse from the Brahma-yāmala:
śruti-smṛti-purāṇādi-
pañcarātra-vidhiṁ vinā
aikāntikī harer bhaktir
utpātāyaiva kalpate
"Devotional service of the Lord that ignores the authorized Vedic literatures like the Upaniṣads, purāṇas and Nārada-pañcarātra is simply an unnecessary disturbance in society." (Bhakti-rasāmṛta-sindhu 1.2.101)
(Srimad Bhagavatam-----8:12:10-----purport).

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. When the Lord wanted to give Dhruva a benediction, Dhruva refused it. Svāmin kṛtārtho'smi varaṁ na yāce (CC.2:22:42). "My dear Lord," he said, "I am fully satisfied. I do not ask for any benediction for material sense gratification." We actually see that even young boys and girls in the Kṛṣṇa consciousness movement have given up their long practice of bad habits like illicit sex, meat-eating, intoxication and gambling. Because Kṛṣṇa consciousness is so potent that it gives them full satisfaction, they are no longer interested in material sense gratification.
(Srimad Bhagavatam-----10:1:4-----purport).

Śrīla Narottama dāsa Ṭhākura, a great ācārya in the preceptorial line of Lord Śrī Caitanya Mahāprabhu, has said for our benefit that one can perfectly see the dhāmas only when one completely gives up the mentality of lording it over material nature. One's spiritual vision develops proportionately to one's giving up the debased mentality of unnecessarily enjoying matter. A diseased person who has become diseased because of a certain bad habit must be ready to follow the advice of the physician, and as a natural sequence he must attempt to give up the cause of the disease. The patient cannot indulge in the bad habit and at the same time expect to be cured by the physician. Modern materialistic civilization, however, is maintaining a diseased atmosphere. The living being is a spiritual spark, as spiritual as the Lord Himself. The only difference is that the Lord is great and the living being is small.
(Sri Caitanya Caritamrta-----1:5:20-----purport).

The worship of the Deity in the temple is essential to reduce one's restlessness due to the contaminations of conditioned life. Thus Nārada, in his pāñcarātrikī-vidhi, and other great sages have sometimes stressed that since every conditioned soul has a bodily concept of life aimed at sense enjoyment, to restrict this sense enjoyment the rules and regulations for worshiping the Deity in the temple are essential. Śrīla Rūpa Gosvāmī has described that the holy name of the Lord can be chanted by liberated souls, but almost all the souls we have to initiate are conditioned. It is advised that one chant the holy name of the Lord without offenses and according to the regulative principles, yet due to their past bad habits they violate these rules and regulations. Thus the regulative principles for worship of the Deity are also simultaneously essential.
(Sri Caitanya Caritamrta-----1:7:76-----purport).

In this verse it is explained that one who chants the Hare Kṛṣṇa mantra develops bhāva, ecstasy, which is the point at which revelation begins. It is the preliminary stage in developing one's original love for God. Lord Kṛṣṇa mentions this bhāva stage in the Bhagavad-gītā (10.8):
ahaṁ sarvasya prabhavo mattaḥ sarvaṁ pravartate
iti matvā bhajante māṁ budhā bhāva-samanvitāḥ
"I am the source of all spiritual and material worlds. Everything emanates from Me. The wise who know this perfectly engage in My devotional service and worship Me with all their hearts." A neophyte disciple begins by hearing and chanting, associating with devotees and practicing the regulative principles, and thus he vanquishes all of his unwanted bad habits. In this way he develops attachment for Kṛṣṇa and cannot forget Kṛṣṇa even for a moment. Bhāva is the almost successful stage of spiritual life.
(Sri Caitanya Caritamrta-----1:7:83-----purport).

Until five thousand years ago, when the entire planet was under the control of Mahārāja Parīkṣit, the Vedic culture was current everywhere. Gradually, however, people were influenced by non-Vedic culture, and they lost sight of how to behave in connection with devotional service. Śrīla Rūpa Gosvāmī and Sanātana Gosvāmī very kindly preached the bhakti cult in western India, and following in their footsteps the propagators of the Caitanya cult in the Western countries are spreading the saṅkīrtana movement and inculcating the principles of Vaiṣṇava behavior, thus purifying and reforming many persons who were previously accustomed to the culture of mlecchas and yavanas. All of our devotees in the Western countries give up their old habits of illicit sex, intoxication, meat-eating and gambling. Of course, five hundred years ago these practices were unknown in India—at least in eastern India—but unfortunately at present all of India has been victimized by these non-Vedic principles, which are sometimes even supported by the government.
(Sri Caitanya Caritamrta-----1:10:89-----purport).

The next stage is called anartha-nivṛtti, in which all the misgivings of material life are vanquished. A person gradually reaches this stage by regularly performing the primary principles of devotional service under the guidance of the spiritual master. There are many bad habits we acquire in the association of material contamination, chief of which are illicit sexual relationships, eating animal food, indulging in intoxication, and gambling. The first thing the expert spiritual master does when he engages his disciple in regulated devotional service is to instruct him to abstain from these four principles of sinful life.
(Narada Bhakti Sutra).

Here the wonderful fruit of love of Godhead distributed by Lord Caitanya Mahāprabhu is described. We have practical experience that anyone who accepts this fruit and sincerely tastes it immediately becomes mad after it and gives up all his bad habits, being intoxicated by Caitanya Mahāprabhu's gift, the Hare Kṛṣṇa mahā-mantra. The statements of Śrī Caitanya-caritāmṛta are so practical that anyone can test them. As far as we are concerned, we are most confident of the success of the distribution of the great fruit of love of Godhead through the medium of chanting the mahā-mantra—Hare Kṛṣṇa, Hare Kṛṣṇa, Kṛṣṇa Kṛṣṇa, Hare Hare/ Hare Rāma, Hare Rāma, Rāma Rāma, Hare Hare.
(Sri Caitanya Caritamrta-----1:9:48-----purport).