The duration of a day in the life of Brahmā is 4,320,000,000 solar years. This is stated also in the Bhagavad-gītā. So for this period Brahmājī rests in yoga-nidrā within the body of the Garbhodakaśāyī Viṣṇu, the generator of Brahmā. Thus after the sleeping period of Brahmā, when there is again creation by the will of the Lord through the agency of Brahmā, all the great ṛṣis again appear from different parts of the transcendental body, and Nārada also appears. This means that Nārada appears in the same transcendental body, just as a man awakes from sleep in the same body. Śrī Nārada is eternally free to move in all parts of the transcendental and material creations of the Almighty. He appears and disappears in his own transcendental body, which is without distinction of body and soul, unlike conditioned beings.
(Srimad Bhagavatam----1:6:30----purport).

As stated in the Bhagavad-gītā, there are three divisions of the material spheres, namely the ūrdhva-loka (topmost planets), madhya-loka (midway planets) and adho-loka (downward planets). Beyond the ūrdhva-loka planets, that is to say above the Brahmaloka, are the material coverings of the universes, and above that is the spiritual sky, which is unlimited in expansion, containing unlimited self-illuminated Vaikuṇṭha planets inhabited by God Himself along with His associates, who are all eternally liberated living entities. Śrī NāradaMuni could enter all these planets in both the material and spiritual spheres without restriction, as much as the almighty Lord is free to move personally in any part of His creation. In the material world the living beings are influenced by the three material modes of nature, namely goodness, passion and ignorance. But Śrī Nārada Muni is transcendental to all these material modes, and thus he can travel everywhere unrestricted. He is a liberated spaceman. The causeless mercy of Lord Viṣṇu is unparalleled, and such mercy is perceived by the devotees only by the grace of the Lord. Therefore, the devotees never fall down, but the materialists, i.e., the fruitive workers and the speculative philosophers, do fall down, being forced by their respective modes of nature. The ṛṣis, as above mentioned, cannot enter into the transcendental world like Nārada. This fact is disclosed in the Narasiṁha Purāṇa. Ṛṣis like Marīci are authorities in fruitive work, and ṛṣis like Sanaka and Sanātana are authorities in philosophical speculations. But Śrī Nārada Muni is the prime authority for transcendental devotional service of the Lord. All the great authorities in the devotional service of the Lord follow in the footsteps of Nārada Muni in the order of the Nārada-bhakti-sūtra, and therefore all the devotees of the Lord are unhesitatingly qualified to enter into the kingdom of God, Vaikuṇṭha.
(Srimad Bhagavatam----1:6:31----purport).

The musical stringed instrument called the vīṇā, which was handed to Nārada by Lord Śrī Kṛṣṇa, is described in the Liṅga Purāṇa, and this is confirmed by Śrīla Jīva Gosvāmī. This transcendental instrument is identical with Lord Śrī Kṛṣṇa and Nārada because all of them are of the same transcendental category. Sound vibrated by the instrument cannot be material, and therefore the glories and pastimes which are broadcast by the instrument of Nārada are also transcendental, without a tinge of material inebriety. The seven singing meters, namely ṣa (ṣaḍja), ṛ (ṛṣabha), gā (gāndhāra), ma (madhyama), pa (pañcama), dha (dhaivata) and ni (niṣāda), are also transcendental and specifically meant for transcendental songs. As a pure devotee of the Lord, Śrī Nāradadeva is always fulfilling his obligation to the Lord for His gift of the instrument, and thus he is always engaged in singing His transcendental glories and is therefore infallible in his exalted position. Following in the footsteps of Śrīla Nārada Muni, a self-realized soul in the material world should also properly use the sound meters, namely ṣa, ṛ, gā, mā, etc., in the service of the Lord by constantly singing the glories of the Lord, as confirmed in the Bhagavad-gītā.
(Srimad Bhagavatam----1:6:32----purport).

The Absolute Personality of Godhead is not different from His transcendental name, form, pastimes and the sound vibrations thereof. As soon as a pure devotee engages himself in the pure devotional service of hearing, chanting and remembering the name, fame and activities of the Lord, at once He becomes visible to the transcendental eyes of the pure devotee by reflecting Himself on the mirror of the heart by spiritual television. Therefore a pure devotee who is related with the Lord in loving transcendental service can experience the presence of the Lord at every moment. It is a natural psychology in every individual case that a person likes to hear and enjoy his personal glories enumerated by others. That is a natural instinct, and the Lord, being also an individual personality like others, is not an exception to this psychology because psychological characteristics visible in the individual souls are but reflections of the same psychology in the Absolute Lord. The only difference is that the Lord is the greatest personality of all and absolute in all His affairs. If, therefore, the Lord is attracted by the pure devotee's chanting of His glories, there is nothing astonishing. Since He is absolute, He can appear Himself in the picture of His glorification, the two things being identical. Śrīla Nārada chants the glorification of the Lord not for his personal benefit but because the glorifications are identical with the Lord. Nārada Muni penetrates into the presence of the Lord by the transcendental chanting.
(Srimad Bhagavatam----1:6:33----purport).

The symptom of a living being is that he cannot remain silent even for some time. He must be doing something, thinking of something or talking about something. Generally the materialistic men think and discuss about subjects which satisfy their senses. But as these things are exercised under the influence of the external, illusory energy, such sensual activities do not actually give them any satisfaction. On the contrary, they become full with cares and anxieties. This is called māyā, or what is not. That which cannot give them satisfaction is accepted as an object for satisfaction. So Nārada Muni, by his personal experience, says that satisfaction for such frustrated beings engaged in sense gratification is to chant always the activities of the Lord. The point is that the subject matter only should be changed. No one can check the thinking activities of a living being, nor the feeling, willing or working processes. But if one wants actual happiness, one must change the subject matter only. Instead of talking of the politics of a dying man, one might discuss the politics administered by the Lord Himself. Instead of relishing activities of the cinema artists, one can turn his attention to the activities of the Lord with His eternal associates like the gopīs and Lakṣmīs. The almighty Personality of Godhead, by His causeless mercy, descends on the earth and manifests activities almost on the line of the worldly men, but at the same time extraordinarily, because He is almighty. He does so for the benefit of all conditioned souls so that they can turn their attention to transcendence. By doing so, the conditioned soul will gradually be promoted to the transcendental position and easily cross the ocean of nescience, the source of all miseries. This is stated from personal experience by such an authority as Śrī Nārada Muni. And we can have the same experience also if we begin to follow in the footsteps of the great sage, the dearmost devotee of the Lord.
(Srimad Bhagavatam----1:6:34----purport).

All the mysteries of transcendental realization are duly experienced by Nārada Muni himself, and therefore by hearing such an authority one can have some idea of the results of devotional life, which are hardly delineated even in the original texts of the Vedas. In the Vedas and Upaniṣads there are only indirect hints to all this. Nothing is directly explained there, and therefore Śrīmad-Bhāgavatam is the mature fruit of all the Vedic trees of literatures.
(Srimad Bhagavatam----1:6:36----purport).