The principles of dharma, religion, come down in the paramparā system beginning with twelve personalities—namely, Lord Brahmā; the great saint Nārada; Lord Śiva; the four Kumāras; Kapila, the son of Devahūti; Svāyambhuva Manu; Prahlāda Mahārāja; King Janaka; grandfather Bhīṣma; Bali Mahārāja; Śukadeva Gosvāmī; and Yamarāja. The principles of religion are known to these twelve personalities. Dharma refers to the religious principles by which one can understand the Supreme Personality of Godhead. Dharma is very confidential, uncontaminated by any material influence, and very difficult for ordinary men to understand. However, if one actually understands dharma, he immediately becomes liberated and is transferred to the kingdom of God. Bhāgavata-dharma, or the principle of religion enunciated by the paramparā system, is the supreme principle of religion. In other words, dharma refers to the science of bhakti-yoga, which begins by the novice's chanting the holy name of the Lord (tan-nāma-grahaṇādibhiḥ).
(Sri Caitanya Caritamrta----2:11:99----purport).

The devotees of Lord Caitanya must preach Kṛṣṇa consciousness in every village and town in the world. That will satisfy the Lord. It is not that one should act whimsically for his own personal satisfaction. This order comes down through the paramparā system, and the spiritual master presents these orders to the disciple so that he can spread the message of Śrī Caitanya Mahāprabhu. It is the duty of every disciple to carry out the order of the bona fide spiritual master and spread Lord Caitanya's message all over the world.
(Sri Caitanya Caritamrta----2:16:64----purport).

The transcendental potency of the Hare Kṛṣṇa mahā-mantra is herein explained. First, the holy name is vibrated by Śrī Caitanya Mahāprabhu. When someone hears from Him directly, he is purified. When another person hears from that person, he also is purified. In this way the purification process is advanced among pure devotees. Śrī Caitanya Mahāprabhu is the Supreme Personality of Godhead, and no one can claim His potency. Nonetheless, if one is a pure devotee, hundreds and thousands of men can be purified by his vibration. This potency is within every living being, provided he chants the Hare Kṛṣṇa mahā-mantra offenselessly and without material motives. When a pure devotee chants offenselessly, another person will become a Vaiṣṇava, and from him another Vaiṣṇava will emerge. This is the paramparā system.
(Sri Caitanya Caritamrta----2:17:48-49----purport).

Śrīla Rūpa Gosvāmī has described Śrī Caitanya Mahāprabhu as mahā-vadānya-avatāra, the most munificent incarnation. Although Śrī Caitanya Mahāprabhu is not physically present now, simply by chanting His holy name (śrī-kṛṣṇa-caitanya prabhu-nityānanda śrī-advaita gadādhara śrīvāsādi-gaura-bhakta-vṛnda) people throughout the world are becoming devotees. This is due to the ecstatic chanting of the holy name of the Lord. It is said that a pure devotee can see the Lord at every moment, and because of this he is empowered by the Lord. This is confirmed in the Brahma-saṁhitā (5.38): premāñjana-cchurita-bhakti-vilocanena santaḥ sadaiva hṛdayeṣu vilokayanti. Śrī Caitanya Mahāprabhu appeared five hundred years ago, but it cannot be said that now the potency of the Hare Kṛṣṇa mahā-mantra is less than it was in His presence. By hearing Śrī Caitanya Mahāprabhu through the paramparā system, one can be purified. Therefore in this verse it is said, tathāpi tāṅra darśana-śravaṇa-prabhāve. It is not that everyone is able to see Kṛṣṇa or Śrī Kṛṣṇa Caitanya Mahāprabhu physically, but if one hears about Him through books like Śrī Caitanya-caritāmṛta and through the paramparā system of pure Vaiṣṇavas, there is no difficulty in becoming a pure Vaiṣṇava, free from mundane desires and personal motivations.
(Sri Caitanya Caritamrta----2:17:51----purport).

Those who accept the logic of gaḍḍālikā-pravāha and follow in the footsteps of pseudo mahājanas are carried away by the waves of māyā. Bhaktivinoda Ṭhākura therefore warns:
miche māyāra vaśe, yāccha bhese’,
khāccha hābuḍubu, bhāi
jīva kṛṣṇa-dāsa, e viśvāsa,
ka’rle ta' āra duḥkha nāi
“Don’t be carried away by the waves of māyā. Just surrender to the lotus feet of Kṛṣṇa, and all miseries will end.” Those who follow social customs and behavior forget to follow the path chalked out by the mahājanas; thus they are offenders at the feet of the mahājanas. Sometimes they consider such mahājanas very conservative, or they create their own mahājanas. In this way they ignore the principles of the paramparā system. This is a great misfortune for everyone. If one does not follow in the footsteps of the real mahājanas, one's plans for happiness will be frustrated.
(Sri Caitanya Caritamrta----2:17:185----purport).

The sound vibration oṁkāra is the root of Vedic knowledge. Oṁkāra is known as the mahā-vākya, or supreme sound. Whatever meaning is in the supreme sound oṁkāra is further understood in the Gāyatrī mantra. Again, this same meaning is explained in Śrīmad-Bhāgavatam in the four ślokas known as the catuḥ-ślokī, which begin with the words ahaṁ evāsam evāgre. The Lord says, "Only I existed before the creation." From this statement, four ślokas have been composed, and these are known as the catuḥ-ślokī (SB 2.9.33/34/35/36). In this way the Supreme Personality of Godhead informed Lord Brahmā about the purport of the catuḥ-ślokī. Again, Lord Brahmā explained this to Nārada Muni, and Nārada Muni explained it to Śrīla Vyāsadeva. This is the paramparā system, the disciplic succession. The import of Vedic knowledge, the original word praṇava, has been explained in Śrīmad-Bhāgavatam. The conclusion is that the Brahma-sūtra is explained in Śrīmad-Bhāgavatam.
(Sri Caitanya Caritamrta----2:25:97----purport).

Real spiritual knowledge has to be received from revealed scriptures. After this knowledge is attained, one can begin to perceive his actual spiritual life. Any knowledge achieved by speculation is imperfect. One must receive knowledge from the paramparā system and from the guru; otherwise one will be bewildered and will ultimately become an impersonalist.
(Sri Caitanya Caritamrta----2:25:118----purport).

Caitanya Mahāprabhu directly empowered Śrīla Rūpa Gosvāmī and Śrīla Sanātana Gosvāmī. Following in their footsteps, the other Gosvāmīs understood Śrī Caitanya Mahāprabhu and His mission. One should understand Śrī Kṛṣṇa Caitanya and Lord Śrī Kṛṣṇa from the six Gosvāmīs in the paramparā system. The Kṛṣṇa consciousness movement is following as strictly as possible in the footsteps of the Gosvāmīs. Narottama dāsa Ṭhākura says, ei chaya gosāñi yāṅra, mui tāṅra dāsa: "I am the servant of the six Gosvāmīs." The philosophy of Kṛṣṇa consciousness is to become the servant of the servant of the servant of the Lord (cc.2:13:80). Whoever wants to understand the difficult subject matter of kṛṣṇa-kathā should accept the disciplic succession. If one is somehow or other able to understand Kṛṣṇa, his life is successful.
(Sri Caitanya Caritamrta----2:25:271----purport).

One is forbidden to accept the guru, or spiritual master, as an ordinary human being (guruṣu nara-matiḥ). When Rāmānanda Rāya spoke to Pradyumna Miśra, Pradyumna Miśra could understand that Rāmānanda Rāya was not an ordinary human being. A spiritually advanced person who is authorized to act as the spiritual master speaks as the Supreme Personality of Godhead dictates from within. Thus it is not he that is personally speaking. In other words, when a pure devotee or spiritual master speaks, what he says should be accepted as having been directly spoken by the Supreme Personality of Godhead in the paramparā system.
(Sri Caitanya Caritamrta----3:5:71----purport).

Grāmya-kavi refers to a poet or writer such as the authors of novels and other fiction who write only about the relationships between man and woman. Vidagdha-ātmīya-vākya, however, refers to words written by a devotee who fully understands pure devotional service. Such devotees, who follow the paramparā system, are sometimes described as sajātīyāśaya-snigdha, or "pleasing to the same class of people." Only the poetry and other writings of such devotees are accepted with great happiness by devotees.
(Sri Caitanya Caritamrta----3:5:107----purport).

Vallabha Bhaṭṭa was greatly proud of his knowledge in devotional service, and therefore he wanted to speak about Lord Śrī Caitanya Mahāprabhu without understanding the Lord's position. The Lord therefore hinted in many ways that if Vallabha Bhaṭṭa wanted to know what devotional service actually is, he would have to learn from all the devotees He mentioned, beginning with Advaita Ācārya, Lord Nityānanda, Sārvabhauma Bhaṭṭācārya and Rāmānanda Rāya. As Svarūpa Dāmodara has said, if one wants to learn the meaning of Śrīmad-Bhāgavatam, one must take lessons from a realized soul. One should not proudly think that one can understand the transcendental loving service of the Lord simply by reading books. One must become a servant of a Vaiṣṇava. As Narottama dāsa Ṭhākura has confirmed, chāḍiyā vaiṣṇava-sevā nistāra peyeche kebā: one cannot be in a transcendental position unless one very faithfully serves a pure Vaiṣṇava. One must accept a Vaiṣṇava guru (ādau gurv-āśrayam), and then by questions and answers one should gradually learn what pure devotional service to Kṛṣṇa is. That is called the paramparā system.
(Sri Caitanya Caritamrta----3:7:53----purport).

Śrīmad-Bhāgavatam has many ṭīkās, or commentaries, following the paramparā system, but Śrīdhara Svāmī’s is first. The commentaries of all the other ācāryas follow his. The paramparā system does not allow one to deviate from the commentaries of the previous ācāryas. By depending upon the previous ācāryas, one can write beautiful commentaries. However, one cannot defy the previous ācāryas. The false pride that makes one think that he can write better than the previous ācāryas will make one's comments faulty. At the present moment it has become fashionable for everyone to write in his own way, but such writing is never accepted by serious devotees. Because of false pride, every scholar and philosopher wants to exhibit his learning by interpreting the śāstras, especially the Bhagavad-gītā and Śrīmad-Bhāgavatam, in his own way. This system of commenting in one's own way is fully condemned by Śrī Caitanya Mahāprabhu. Therefore He says, "artha-vyasta" likhana sei. Commentaries written according to one's own philosophical way are never accepted; no one will appreciate such commentaries on the revealed scriptures.
(Sri Caitanya Caritamrta----3:7:134----purport).