One may chant the holy name of Lord Kṛṣṇa, or one may chant the holy name of Lord Rāma or Nṛsiṁhadeva (rāmādi-mūrtiṣu kalā-niyamena tiṣṭhan (Bs. 5.39)). The Lord has innumerable forms and names, and devotees may meditate upon a particular form and chant the holy name according to his attraction. The best course is to hear of the holy name, form and so on from a pure devotee of the same standard as oneself. In other words, one who is attached to Kṛṣṇa should chant and hear from other pure devotees who are also attached to Lord Kṛṣṇa. The same principle applies for devotees attracted by Lord Rāma, Lord Nṛsiṁha and other forms of the Lord.
(Srimad Bhagavatam-----7:5:23-24-----purport).

The coherent purpose of Lord Rāmacandra, Lord Kṛṣṇa and Lord Caitanya Mahāprabhu is to teach human society how to be happy by following the instructions of the Supreme Lord.
(Srimad Bhagavatam-----8:1:16-----purport).

The original cause of everything is the Supreme Personality of Godhead, and after being annihilated, everything enters into Him (prakṛtiṁ yānti māmikām). Thus the Supreme Lord, the Personality of Godhead—Lord Rāmacandra or Lord Kṛṣṇa—is the original cause of everything.
(Srimad Bhagavatam-----8:3:3-----purport).

"Whenever and wherever there is a decline in religious practice, O descendant of Bharata, and a predominant rise of irreligion—at that time I descend Myself." Thus it is not imagination but a fact that the Supreme Personality of Godhead, by His sweet will, appears in different incarnations, such as Matsya, Kūrma, Varāha, Nṛsiṁha, Vāmana, Paraśurāma, Rāmacandra, Balarāma, Buddha and many other forms. Devotees are always eager to see one of the Lord's innumerable forms. It is said that just as no one can count how many waves there are in the sea, no one can count the forms of the Lord.
(Srimad Bhagavatam-----8:5:46-----purport).

This Tenth Chapter describes how Lord Rāmacandra appeared in the dynasty of Mahārāja Khaṭvāṅga. It also describes the Lord's activities, telling how He killed Rāvaṇa and returned to Ayodhyā, the capital of His kingdom.
The son of Mahārāja Khaṭvāṅga was Dīrghabāhu, and his son was Raghu. The son of Raghu was Aja, the son of Aja was Daśaratha, and the son of Daśaratha was Lord Rāmacandra, the Supreme Personality of Godhead. When the Lord descended into this world in His full quadruple expansion-as Lord Rāmacandra, Lakṣmaṇa, Bharata and Śatrughna-great sages like Vālmīki who were actually in knowledge of the Absolute Truth described His transcendental pastimes. Śrīla Śukadeva Gosvāmī describes these pastimes in brief.
Lord Rāmacandra went with Viśvāmitra and killed Rākṣasas like Mārīca. After breaking the stout and strong bow known as Haradhanu, the Lord married mother Sītā and cut down the prestige of Paraśurāma. To obey the order of His father, He entered the forest, accompanied by Lakṣmaṇa and Sītā. There He cut off the nose of Śūrpaṇakhā and killed the associates of Rāvaṇa, headed by Khara and Dūṣaṇa. Rāvaṇa's kidnapping of Sītādevī was the beginning of this demon's misfortune. When Mārīca assumed the form of a golden deer, Lord Rāmacandrawent to bring the deer to please Sītādevī, but in the meantime Rāvaṇa took advantage of the Lord's absence to kidnap her. When Sītādevī was kidnapped, Lord Rāmacandra, accompanied by Lakṣmaṇa, searched for her throughout the forest. In the course of this search, They met Jaṭāyu. Then the Lord killed the demon Kabandha and the commander Vāli and established a friendly relationship with Sugrīva. After organizing the military strength of the monkeys and going with them to the shore of the sea, the Lord awaited the arrival of Samudra, the ocean personified, but when Samudra did not come, the Lord, the master of Samudra, became angry. Then Samudra came to the Lord with great haste and surrendered to Him, wanting to help Him in every way. The Lord then attempted to bridge the ocean, and, with the help of advice from Vibhīṣaṇa, He attacked Rāvaṇa's capital, Laṅkā. Previously, Hanumān, the eternal servant of the Lord, had set fire to Laṅkā, and now, with the help of Lakṣmaṇa, the forces of Lord Rāmacandra killed all the Rākṣasa soldiers. Then Lord Rāmacandra personally killed Rāvaṇa. Mandodarī and other wives lamented for Rāvaṇa, and in accordance with Lord Rāmacandra's order, Vibhīṣaṇa performed the funeral ceremonies for all the dead in the family. LordRāmacandra then gave Vibhīṣaṇa the right to rule Laṅkā and also granted him a long duration of life. The Lord delivered Sītādevī from the Aśoka forest and carried her in a flower airplane to His capital Ayodhyā, where He was received by His brother Bharata. When Lord Rāmacandra entered Ayodhyā, Bharata brought His wooden shoes, Vibhīṣaṇa and Sugrīva held a whisk and fan, Hanumān carried an umbrella, Śatrughna carried the Lord's bow and two quivers, and Sītādevī carried a waterpot containing water from holy places. Aṅgada carried a sword, and Jāmbavān (Ṛkṣarāja) carried a shield. After Lord Rāmacandra, accompanied by Lord Lakṣmaṇa and mother Sītādevī, met all His relatives, the great sage Vasiṣṭha enthroned Him as King. The chapter ends with a short description of Lord Rāmacandra's rule in Ayodhyā.
(Srimad Bhagavatam-------9:10-----summary).

Lord Rāmacandra and His brothers, Lakṣmaṇa, Bharata and Śatrughna, are all viṣṇu-tattva, not jīva-tattva. The Supreme Personality of Godhead expands into many, many forms. Advaitam acyutam anādim ananta-rūpam (Bs. 5.33). Although they are one and the same, viṣṇu-tattva has many forms and incarnations. As confirmed in the Brahma-saṁhitā (5.39), rāmādi-mūrtiṣu kalā-niyamena tiṣṭhan. The Lord is situated in many forms, such as Rāma, Lakṣmaṇa, Bharata and Śatrughna, and these forms may exist in any part of His creation. All these forms exist permanently, eternally, as individual Personalities of Godhead, and they resemble many candles, all equally powerful. Lord Rāmacandra, Lakṣmaṇa, Bharata and Śatrughna, who, being viṣṇu-tattva, are all equally powerful, became the sons of Mahārāja Daśaratha in response to prayers by the demigods.
(Srimad Bhagavatam-------9:10:2-----purport).

In Bhagavad-gītā (4.34) the Supreme Personality of Godhead advises:
tad viddhi praṇipātena
paripraśnena sevayā
upadekṣyanti te jñānaṁ
jñāninas tattva-darśinaḥ
"Just try to learn the truth by approaching a spiritual master. Inquire from him submissively and render service unto him. The self-realized soul can impart knowledge unto you because he has seen the truth." Unless one is tattva-darśī, in complete knowledge of the Absolute Truth, one cannot describe the activities of the Personality of Godhead. Therefore although there are many so-called Rāmāyaṇas, or histories of Lord Rāmacandra's activities, some of them are not actually authoritative. Sometimes Lord Rāmacandra's activities are described in terms of one's own imaginations, speculations or material sentiments. But the characteristics of Lord Rāmacandra should not be handled as something imaginary. While describing the history of LordRāmacandra, Śukadeva Gosvāmī told Mahārāja Parīkṣit, "You have already heard about the activities of Lord Rāmacandra." Apparently, therefore, five thousand years ago there were many Rāmāyaṇas, or histories of Lord Rāmacandra's activities, and there are many still. But we must select only those books written by tattva-darśīs (jñāninas tattva-darśinaḥ (B.G.4:34), not the books of so-called scholars who claim knowledge only on the basis of a doctorate. This is a warning by Śukadeva Gosvāmī. Ṛṣibhis tattva-darśibhiḥ.

(Srimad Bhagavatam-------9:10:3-----purport).