Because the princes were ready to enter into some severe austerity in order to worship the Lord, Lord Śiva advised them to constantly chant of and meditate upon the Supreme Personality of Godhead. It is significant that Lord Śiva personally offered his prayers to the Supreme Personality of Godhead just as he was taught by his father, Lord Brahmā. Similarly, he was also preaching to the princes according to the paramparā system. One not only should practice the instructions received from the spiritual master but should also distribute this knowledge to one's disciples.
(Srimad Bhagavatam----4:24:70----purport).

Vedic instructions are not subject to mistakes. The knowledge of the Vedas is knowledge received directly from God, and there is consequently no question of illusion, cheating, mistakes or imperfect senses. All Vedic knowledge is perfect because it is received directly from God by the paramparā, disciplic succession. In Śrīmad-Bhāgavatam (1.1.1) it is said: tene brahma hṛdā ya ādi-kavaye. The original creature of this universe, known as the ādi-kavi, or Lord Brahmā, was instructed by Kṛṣṇa through the heart. After receiving these Vedic instructions from Lord Kṛṣṇa Himself, Brahmā distributed the knowledge by the paramparā system to Nārada, and Nārada in turn distributed the knowledge to Vyāsa. In this way Vedic knowledge is perfect. If we act according to Vedic knowledge, there is no question of being involved in sinful activities.
(Srimad Bhagavatam----4:26:7----purport).

One who offers prayers to the Lord to fulfill his different desires must know that the highest perfectional fulfillment of desire is to go back home, back to Godhead. In this verse it is indicated that those who remember the activities of the Pracetās, the sons of King Prācīnabarhiṣat, will be delivered and blessed. So what to speak of the sons of King Prācīnabarhiṣat, who are directly connected with the Supreme Personality of Godhead? This is the way of the paramparā system. If we follow the ācāryas, we attain the same benefit as our predecessors. If one follows the decisions of Arjuna, he should be considered to be directly hearing Bhagavad-gītā from the Supreme Personality of Godhead. There is no difference between hearing Bhagavad-gītā directly from the Supreme Lord and following a personality like Arjuna, who formerly heard Bhagavad-gītā directly from the Lord. Sometimes foolish people argue that since Kṛṣṇa is not present at the moment, one cannot take direct instructions from Him. Such foolish people do not know that there is no difference between directly hearing Bhagavad-gītā and reading it, as long as one accepts Bhagavad-gītā as it is, spoken by the Lord. However, if one wants to understand Bhagavad-gītā by his imperfect interpretations, one cannot possibly understand the mysteries of Bhagavad-gītā, even though one may be a great scholar according to mundane estimation.
(Srimad Bhagavatam----4:30:10----purport).

Śrī Priyavrata was the grandson of Lord Brahmā. Therefore according to social etiquette, his position was inferior. It is the duty of the inferior to carry out the order of the superior with great respect. Priyavrata therefore immediately said, "Yes, sir. I shall carry out your order." Priyavrata is described as a mahā-bhāgavata, a great devotee. The duty of a great devotee is to carry out the order of the spiritual master, or the spiritual master of the spiritual master in the paramparā system. As described in Bhagavad-gītā (4.2), evaṁ paramparā prāptam: one has to receive the instructions of the Supreme Lord through the disciplic chain of spiritual masters. A devotee of the Lord always considers himself a servant of the servant of the servant of the Lord (cc.2:13:80).
(Srimad Bhagavatam----5:1:20----purport).

Those who are Āryans strictly follow the Vedic principles, but in this age of Kali a community has sprung up known as the ārya-samāja, which is ignorant of the import of the Vedas in the paramparā system. Their leaders decry all bona fide ācāryas, and they pose themselves as the real followers of the Vedic principles. These ācāryas who do not follow the Vedic principles are presently known as the ārya-samājas, or the Jains. Not only do they not follow the Vedic principles, but they have no relationship with Lord Buddha. Imitating the behavior of Sumati, they claim to be the descendants of Ṛṣabhadeva. Those who are Vaiṣṇavas carefully avoid their company because they are ignorant of the path of the Vedas.
(Srimad Bhagavatam----5:15:1----purport).

Śrīla Śukadeva Gosvāmī admitted that to give full details of this expansive material universe would be impossible, but nevertheless he wanted to give the King as much knowledge as he had received through the paramparā system.
(Srimad Bhagavatam----5:16:4----purport).

In Bhagavad-gītā Lord Kṛṣṇa refers to bhāgavata-dharma as the most confidential religious principle (sarva-guhyatamam, guhyād guhyataram). Kṛṣṇa says to Arjuna, "Because you are My very dear friend, I am explaining to you the most confidential religion." Sarva-dharmān parityajya mām ekaṁ śaraṇaṁ vraja: (B.G.18:66) "Give up all other duties and surrender unto Me." One may ask, "If this principle is very rarely understood, what is the use of it?" In answer, Yamarāja states herein that this religious principle is understandable if one follows the paramparā system of Lord Brahmā, Lord Śiva, the four Kumāras and the other standard authorities. There are four lines of disciplic succession: one from Lord Brahmā, one from Lord Śiva, one from Lakṣmī, the goddess of fortune, and one from the Kumāras. The disciplic succession from Lord Brahmā is called the Brahma-sampradāya, the succession from Lord Śiva (Śambhu) is called the Rudra-sampradāya, the one from the goddess of fortune, Lakṣmījī, is called the Śrī-sampradāya, and the one from the Kumāras is called the Kumāra-sampradāya. One must take shelter of one of these four sampradāyas in order to understand the most confidential religious system. In the Padma Purāṇa it is said, sampradāya-vihīnā ye mantrās te niṣphalā matāḥ: if one does not follow the four recognized disciplic successions, his mantra or initiation is useless. In the present day there are many apasampradāyas, or sampradāyas which are not bona fide, which have no link to authorities like Lord Brahmā, Lord Śiva, the Kumāras or Lakṣmī. People are misguided by such sampradāyas. The śāstras say that being initiated in such a sampradāya is a useless waste of time, for it will never enable one to understand the real religious principles.
(Srimad Bhagavatam----6:3:20-21----purport).

Because Prajāpati Dakṣa was a gṛhamedhī who wanted to remain in household life, he thought that if Nārada Muni could not remain in one place, but had to travel all over the world, that would be a great punishment for him. Actually, however, such a punishment is a boon for a preacher. A preacher is known as parivrājakācārya—an ācārya, or teacher, who always travels for the benefit of human society. Prajāpati Dakṣa cursed Nārada Muni by saying that although he had the facility to travel all over the universe, he would never be able to stay in one place. In the paramparā system from Nārada Muni, I have also been cursed. Although I have many centers that would be suitable places of residence, I cannot stay anywhere, for I have been cursed by the parents of my young disciples. Since the Kṛṣṇa consciousness movement was started, I have traveled all over the world two or three times a year, and although I am provided comfortable places to stay wherever I go, I cannot stay anywhere for more than three days or a week. I do not mind this curse by the parents of my disciples, but now it is necessary that I stay in one place to finish another task—this translation of Śrīmad-Bhāgavatam. If my young disciples, especially those who have taken sannyāsa, take charge of traveling all over the world, it may be possible for me to transfer the curse of the parents to these young preachers. Then I may sit down conveniently in one place for the work of translation.
(Srimad Bhagavatam----6:5:43----purport).

A devotee should always aspire to live in the association of advanced devotees and engage in the service of the Lord through the paramparā system. One should serve the mission of Śrī Caitanya Mahāprabhu through the instructions of the great Gosvāmīs of Vṛndāvana. This is called tāṅdera caraṇa sevi. While serving the lotus feet of the Gosvāmīs, one should live in the association of devotees (bhakta-sane vāsa). This is the business of a devotee. A devotee should not aspire for material profit or lament for material loss. When Aṅgirā Ṛṣi and Nārada saw that Mahārāja Citraketu, an advanced devotee, had fallen in the darkness of ignorance and was lamenting for the material body of his son, by their causeless mercy they came to advise him so that he could be saved from this ignorance.
(Srimad Bhagavatam----6:15:18-19----purport).

Although King Indra and the other demigods are exalted personalities, they were so obedient to Nārada Muni that King Indra immediately accepted Nārada Muni's words concerning Prahlāda Mahārāja. This is called understanding by the paramparā system. Indra and the demigods did not know that a great devotee was in the womb of Kayādhu, the wife of Hiraṇyakaśipu, but they accepted the authoritative statements of Nārada Muni and immediately offered their respects to the devotee by circumambulating the woman in whose womb he was living. To understand God and the devotee by the paramparā system is the process of knowledge. There is no need to speculate about God and His devotee. One should accept the statements of a bona fide devotee and thus try to understand.
(Srimad Bhagavatam----7:7:11----purport).