By regularly discharging devotional service, Pṛthu Mahārāja became transcendental in mind and could therefore constantly think of the lotus feet of the Lord. Because of this, he became completely detached and attained perfect knowledge by which he could transcend all doubt. Thus he was freed from the clutches of false ego and the material conception of life.
In the Nārada-pañcarātra, devotional service to the Lord is likened unto a queen. When a queen gives an audience, many maidservants follow her. The maidservants of devotional service are material opulence, liberation and mystic powers. The karmīs are very much attached to material enjoyment, the jñānīs are very anxious to become freed from material clutches, and the yogīs are very fond of attaining the eight kinds of mystic perfection. From the Nārada-pañcarātra we understand that if one attains the stage of pure devotional service, he also attains all the opulences derived from fruitive activities, empiric philosophical speculation and mystic yogic practice. Śrīla Bilvamaṅgala Ṭhākura therefore prayed in his Kṛṣṇa-karṇāmṛta: "My dear Lord, if I have unflinching devotion to You, You become manifest before me personally, and the results of fruitive activity and empiric philosophical speculation—namely religion, economic development, sense gratification and liberation—become like personal attendants and remain standing before me as if awaiting my order." The idea here is that the jñānīs, by culture of brahma-vidyā, spiritual knowledge, struggle very hard to get out of the clutches of material nature, but a devotee, by dint of his advancement in devotional service, automatically becomes detached from his material body. When the devotee's spiritual body begins to manifest, he actually enters into his activities in transcendental life.
(Srimad Bhagavatam-----4:23:11-----translation and purport).

"If I am engaged in devotional service unto You, my dear Lord, then very easily can I perceive Your presence everywhere. And as far as liberation is concerned, I think that liberation stands at my door with folded hands, waiting to serve me—and all material conveniences of dharma (religiosity), artha (economic development) and kāma (sense gratification) stand with her." (Kṛṣṇa-karṇāmṛta 107) If one is very highly advanced in devotional service, he will have no difficulty in seeing the Supreme Personality of Godhead. If one engages in the service of the spiritual master, he not only sees the Supreme Personality of Godhead but attains liberation. As far as material conveniences are concerned, they automatically come, just as the maidservants of a queen follow the queen wherever she goes. Liberation is no problem for the pure devotee, and all material conveniences are simply awaiting him at all stages of life.
(Srimad Bhagavatam-----4:28:51-----purport).

"All glories to Cintāmaṇi and my initiating spiritual master, Somagiri. All glories to my instructing spiritual master, the Supreme Personality of Godhead, who wears peacock feathers in His crown. Under the shade of His lotus feet, which are like desire trees, Jayaśrī (Rādhārāṇī) enjoys the transcendental mellow of an eternal consort."
This verse is from the Kṛṣṇa-karṇāmṛta, which was written by a great Vaiṣṇava sannyāsī named Bilvamaṅgala Ṭhākura, who is also known as Līlāśuka. He intensely desired to enter into the eternal pastimes of the Lord, and he lived at Vṛndāvana for seven hundred years in the vicinity of Brahma-kuṇḍa, a still-existing bathing tank in Vṛndāvana. The history of Bilvamaṅgala Ṭhākura is given in a book called Śrī-vallabha-digvijaya. He appeared in the eighth century of the Śaka Era in the province of Draviḍa and was the chief disciple of Viṣṇu Svāmī. In a list of temples and monasteries kept in Śaṅkarācārya's monastery in Dvārakā, Bilvamaṅgala is mentioned as the founder of the Dvārakādhīśa temple there. He entrusted the service of his Deity to Hari Brahmacārī, a disciple of Vallabha Bhaṭṭa.
(Sri Caitanya Caritamrta-----1:1:57-----translation and purport).

Bilvamaṅgala Ṭhākura actually entered into the transcendental pastimes of Lord Kṛṣṇa. He has recorded his transcendental experiences and appreciation in the book known as Kṛṣṇa-karṇāmṛta. In the beginning of that book he has offered his obeisances to his different gurus, and it is to be noted that he has adored them all equally. The first spiritual master mentioned is Cintāmaṇi, who was one of his instructing spiritual masters because she first showed him the spiritual path. Cintāmaṇi was a prostitute with whom Bilvamaṅgala was intimate earlier in his life. She gave him the inspiration to begin on the path of devotional service, and because she convinced him to give up material existence to try for perfection by loving Kṛṣṇa, he has first offered his respects to her. Next he offers his respects to his initiating spiritual master, Somagiri, and then to the Supreme Personality of Godhead, who was also his instructing spiritual master. He explicitly mentions Bhagavān, who has peacock feathers on His crown, because the Lord of Vṛndāvana, Kṛṣṇa the cowherd boy, used to come to Bilvamaṅgala to talk with him and supply him with milk. In his adoration of Śrī Kṛṣṇa, the Personality of Godhead, he states that Jayaśrī, the goddess of fortune, Śrīmatī Rādhārāṇī, takes shelter in the shade of His lotus feet to enjoy the transcendental rasa of nuptial love. The complete treatise Kṛṣṇa-karṇāmṛta is dedicated to the transcendental pastimes of Śrī Kṛṣṇa and Śrīmatī Rādhārāṇī. It is a book to be read and understood by the most elevated devotees of Śrī Kṛṣṇa.
(Sri Caitanya Caritamrta-----1:1:57-----purport).

Becoming one with the Supreme Personality of Godhead is not very important for a devotee. Muktiḥ svayaṁ mukulitāñjali sevate ’smān (Kṛṣṇa-karṇāmṛta 107). Speaking from his actual experience, Śrīla Bilvamaṅgala Ṭhākura says that if one develops love of Godhead, mukti (liberation) becomes subservient and unimportant to him. Mukti stands before the devotee and is prepared to render all kinds of services. The Māyāvādī philosophers' standard of mukti is very insignificant for a devotee, for by devotional service even the Supreme Personality of Godhead becomes subordinate to him. An actual example is that the Supreme Lord Kṛṣṇa became the chariot driver of Arjuna, and when Arjuna asked Him to draw his chariot between the two armies (senayor ubhayor madhye rathaṁ sthāpaya me ’cyuta (B.G.1:21), Kṛṣṇa executed his order. Such is the relationship between the Supreme Lord and a devotee that although the Lord is greater than the greatest, He is prepared to render service to the insignificant devotee by dint of his sincere and unalloyed devotional service.
(Sri Caitanya Caritamrta-----1:7:145-----purport).

Caitanya dāsa, the eldest son of Śivānanda Sena, wrote a commentary on Kṛṣṇa-karṇāmṛta that was later translated by Śrīla Bhaktivinoda Ṭhākura in his paper Sajjana-toṣaṇī. According to expert opinion, Caitanya dāsa was the author of the book Caitanya-carita (also known as Caitanya-caritāmṛta), which was written in Sanskrit. The author was not Kavi-karṇapūra, as is generally supposed. This is the opinion of Śrīla Bhaktisiddhānta Sarasvatī Ṭhākura. Śrī Rāmadāsa was the second son of Śivānanda Sena. It is stated in the Gaura-gaṇoddeśa-dīpikā (145) that the two famous parrots named Dakṣa and Vicakṣaṇa in kṛṣṇa-līlā became the elder brothers of Kavi-karṇapūra, namely Caitanya dāsa and Rāmadāsa. Karṇapūra, the third son, who was also known as Paramānanda dāsa or Purī dāsa, was initiated by Śrīnātha Paṇḍita, who was a disciple of Śrī Advaita Prabhu. Karṇapūra wrote many books that are important in Vaiṣṇava literature, such as the Ānanda-vṛndāvana-campū, Alaṅkāra-kaustubha, Gaura-gaṇoddeśa-dīpikā and the great epic Caitanya-candrodaya-nāṭaka. He was born in the year 1448 Śakābda (A.D. 1526). He continually wrote books for ten years, from 1488 until 1498.
(Sri Caitanya Caritamrta-----1:10:62-----purport).

Śrīla Jīva Gosvāmī has written in the beginning of his Tattva-sandarbha, "A devotee from southern India who was born of a brāhmaṇa family and was a very intimate friend of Rūpa Gosvāmī and Sanātana Gosvāmī has written a book that he has not compiled chronologically. Therefore I, a tiny living entity known as jīva, am trying to assort the events of the book chronologically, consulting the direction of great personalities like Madhvācārya, Śrīdhara Svāmī, Rāmānujācārya and other senior Vaiṣṇavas in the disciplic succession." In the beginning of the Bhagavat-sandarbha there are similar statements by Śrīla Jīva Gosvāmī. Śrīla Gopāla Bhaṭṭa Gosvāmī compiled a book called Sat-kriyā-sāra-dīpikā, edited the Hari-bhakti-vilāsa, wrote a foreword to the Ṣaṭ-sandarbha and a commentary on the Kṛṣṇa-karṇāmṛta, and installed the Rādhāramaṇa Deity in Vṛndāvana. In the Gaura-gaṇoddeśa-dīpikā (184) it is mentioned that his previous name in the pastimes of Lord Kṛṣṇa was Anaṅga-mañjarī. Sometimes he is also said to have been an incarnation of Guṇa-mañjarī. Śrīnivāsa Ācārya and Gopīnātha Pūjārī were two of his disciples.
(Sri Caitanya Caritamrta-----1:10:105-----purport).

Śrī Caitanya Mahāprabhu also found two other booksfound two other booksnamely, the Brahma-saṁhitā and Kṛṣṇa-karṇāmṛta. Knowing these books to be excellent, He took them to present to His devotees.
(Sri Caitanya Caritamrta-----2:1:120-----translation).

In the olden days there were no presses, and all the important scriptures were handwritten and kept in large temples. Caitanya Mahāprabhu found the Brahma-saṁhitā and Kṛṣṇa-karṇāmṛta in handwritten texts, and knowing them to be very authoritative, He took them with Him to present to His devotees. Of course, He obtained the permission of the temple commander. Now both the Brahma-saṁhitā and Kṛṣṇa-karṇāmṛta are available in print with commentaries by Śrīla Bhaktisiddhānta Sarasvatī Ṭhākura.
(Sri Caitanya Caritamrta-----2:1:120-----purport).

“"O My Lord, O Supreme Personality of Godhead, O friend of the helpless! You are the only ocean of mercy! Because I have not met You, My inauspicious days and nights have become unbearable. I do not know how I shall pass the time.""
This is a verse from the Kṛṣṇa-karṇāmṛta (41), by Bilvamaṅgala Ṭhākura.
(Sri Caitanya Caritamrta-----2:2:58-----translation and purport).

“"O Kṛṣṇa, O flute-player, the sweetness of Your early age is wonderful within these three worlds. You know My unsteadiness, and I know Yours. No one else knows about this. I want to see Your beautiful attractive face somewhere in a solitary place, but how can this be accomplished?""
This is another quote from the Kṛṣṇa-karṇāmṛta (32) of Bilvamaṅgala Ṭhākura.
(Sri Caitanya Caritamrta-----2:2:61-----translation and purport).

""O My Lord! O dearest one! O only friend of the universe! O Kṛṣṇa, O restless one, O only ocean of mercy! O My Lord, O My enjoyer, O beloved to My eyes! Alas, when will You again be visible to Me?""
This is text 40 of the Kṛṣṇa-karṇāmṛta.
(Sri Caitanya Caritamrta-----2:2:61-----translation and purport).

In the attitude of Rādhārāṇī, Śrī Caitanya Mahāprabhu addressed the gopīs: ""My dear friends, where is that Kṛṣṇa, Cupid personified, who has the effulgence of a kadamba flower, who is sweetness itself, the nectar of My eyes and mind, He who loosens the hair of the gopīs, who is the supreme source of transcendental bliss and My life and soul? Has He come before My eyes again?""
This is another verse from the Kṛṣṇa-karṇāmṛta (68).
(Sri Caitanya Caritamrta-----2:2:74-----translation and purport).

He also passed His time reading the books and singing the songs of Caṇḍīdāsa and Vidyāpati, and listening to quotations from the Jagannātha-vallabha-nāṭaka, Kṛṣṇa-karṇāmṛta and Gīta-govinda. Thus in the association of Svarūpa Dāmodara and Rāya Rāmānanda, Śrī Caitanya Mahāprabhu passed His days and nights chanting and hearing with great pleasure.
(Sri Caitanya Caritamrta-----2:2:77-----purport).