Śrīmad-Bhāgavatam is a natural commentation on the Brahma-sūtra, or the Bādarāyaṇi Vedānta-sūtras. It is called natural because Vyāsadeva is author of both the Vedānta-sūtras and Śrīmad-Bhāgavatam, or the essence of all Vedic literatures. Besides Vyāsadeva, there are other sages who are the authors of six different philosophical systems, namely Gautama, Kaṇāda, Kapila, Patañjali, Jaimini and Aṣṭāvakra. Theism is explained completely in the Vedānta-sūtra, whereas in other systems of philosophical speculations, practically no mention is given to the ultimate cause of all causes. One can sit on the vyāsāsana only after being conversant in all systems of philosophy so that one can present fully the theistic views of the Bhāgavatam in defiance of all other systems. Śrīla Sūta Gosvāmī was the proper teacher, and therefore the sages at Naimiṣāraṇya elevated him to the vyāsāsana. Śrīla Vyāsadeva is designated herein as the Personality of Godhead because he is the authorized empowered incarnation.
(Srimad Bhagavatam------1:1:7------purport).

For the people in general the highest perfection of life is to cease from material activities and be fixed on the path of self-realization. Those who take pleasure in sense enjoyment, or those who are fixed in material bodily welfare work, are called karmīs. Out of thousands and millions of such karmīs, one may become an ātmārāma by self-realization. Ātmā means self, and ārāma means to take pleasure. Everyone is searching after the highest pleasure, but the standard of pleasure of one may be different from the standard of another. Therefore, the standard of pleasure enjoyed by the karmīs is different from that of the ātmārāmas. The ātmārāmas are completely indifferent to material enjoyment in every respect. Śrīla Śukadeva Gosvāmī had already attained that stage, and still he was attracted to undergo the trouble of studying the great Bhāgavatam literature. This means that Śrīmad-Bhāgavatam is a postgraduate study even for the ātmārāmas, who have surpassed all the studies of Vedic knowledge.
(Srimad Bhagavatam------1:7:9------purport).

There is a sort of imitation of this reciting and hearing of Śrīmad-Bhāgavatam by professional men, and their foolish audience thinks that they will get free from the clutches of material attachment and attain the life of fearlessness. Such imitative hearing of Śrīmad-Bhāgavatam is a caricature only, and one should not be misled by such a performance of bhāgavatam saptāha undertaken by ridiculous greedy fellows to maintain an establishment of material enjoyment.
(Srimad Bhagavatam------1:12:28------purport).

Therefore Śrīla Vyāsadeva gives the reader a chance to gradually develop in spiritual realization before actually relishing the essence of the pastimes of the Lord. Thus Vyāsadeva purposefully invokes the gāyatrī mantra: dhīmahi. This gāyatrī mantra is especially meant for spiritually advanced people. When one attains success in chanting gāyatrī mantra, he can enter into the transcendental position of the Lord. First, however, one must acquire the brahminical qualities and become perfectly situated in the mode of goodness in order to chant the gāyatrī mantra successfully. From that point one can begin to transcendentally realize the Lord, His name, His fame, His qualities, etc. Śrīmad-Bhāgavatam is a narration dealing with the svarūpa (form) of the Lord, which is manifested by His internal potency. This potency is distinguished from the external potency, which has manifested the cosmic world within our experience. Śrīla Vyāsadeva makes a clear distinction between the internal and external potencies in the very first verse of the First Chapter of Śrīmad-Bhāgavatam. In that verse he says that the internal potency is factual reality, whereas the external manifested energy in the form of material existence is temporary and illusory, no more real than a mirage in the desert. Water may appear present in a mirage, but real water is somewhere else. Similarly, the manifested cosmic creation appears to be reality, but it is simply a reflection of the true reality which exists in the spiritual world.
(Teachings of Lord Caitanya).

Śrīmad-Bhāgavatam is a narration about the Personality of Godhead and the devotees of the Lord like the Pāṇḍavas. The narration of the Personality of Godhead and His devotees is absolute in itself, and thus to hear it with a devotional attitude is to associate with the Lord and constant companions of the Lord. By the process of hearing Śrīmad-Bhāgavatam one can attain the highest perfection of life, namely going back home, back to Godhead, without failure.
(Srimad Bhagavatam------1:15:51------purport).

The scriptures known as the Pañcarātra-śāstras are recognized Vedic scriptures that have been accepted by the great ācāryas. These scriptures are not products of the modes of passion and ignorance. Learned scholars and brāhmaṇas therefore always refer to them as sātvata-saṁhitās. The original speaker of these scriptures is Nārāyaṇa, the Supreme Personality of Godhead. This is especially mentioned in the Mokṣa-dharma (349.68), which is part of the Śānti-parva of the Mahābhārata. Liberated sages like Nārada and Vyāsa, who are free from the four defects of conditioned souls, are the propagators of these scriptures. Śrī Nārada Muni is the original speaker of the Pañcarātra-śāstra. Śrīmad-Bhāgavatam is also considered a sātvata-saṁhitā. Indeed, Śrī Caitanya Mahāprabhu declared, śrīmad-bhāgavataṁ purāṇam amalam: "Śrīmad-Bhāgavatam is a spotless Purāṇa." Malicious editors and scholars who attempt to misrepresent the Pañcarātra-śāstras to refute their regulations are most abominable. In the modern age, such malicious scholars have even commented misleadingly upon the Bhagavad-gītā, which was spoken by Kṛṣṇa, to prove that there is no Kṛṣṇa.
(Sri Caitanya Caritamrta------1:5:41------purport).

One must know from the above description of creation and annihilation that the supreme consciousness, being omnipresent, can take care of everything with perfect attention. That is the fact of the omnipresence of the Supreme Lord. Persons, still more foolish than the gross materialists, however, claim to be transcendentalists and claim to have such supreme all-pervading consciousness, but offer no proof. Such foolish persons cannot know what is going on behind the next wall, yet they are falsely proud of possessing the cosmic, all-pervading consciousness of the Supreme Person. For them also, hearing of Śrīmad-Bhāgavatam is a great help. It will open their eyes to see that simply by claiming supreme consciousness one does not become supremely conscious. One has to prove in the physical world that he has such supreme consciousness. The ṛṣis of Naimiṣāraṇya, however, were above the gross materialists and the false transcendentalists, and thus they were always anxious to know the real truth in transcendental matters, as discussed by authorities.
(Srimad Bhagavatam------2:10:49-50------purport).