PURPORT
Śrīla Bhaktisiddhānta Sarasvatī has given a description of these books. The Bhakti-rasāmṛta-sindhu is a great book of instruction on how to develop devotional service to Lord Kṛṣṇa and follow the transcendental process. It was finished in the year 1463 Śakābda (A.D. 1541). This book is divided into four parts: pūrva-vibhāga (eastern division), dakṣiṇa-vibhāga (southern division), paścima-vibhāga (western division) and uttara-vibhāga (northern division). In the pūrva-vibhāga, there is a description of the permanent development of devotional service. The general principles of devotional service, the execution of devotional service, ecstasy in devotional service and ultimately the attainment of love of Godhead are described. In this way there are four laharīs (waves) in this division of the ocean of the nectar of devotion.
In the dakṣiṇa-vibhāga (southern division) there is a general description of the mellow (relationship) called bhakti-rasa, which is derived from devotional service. There are also descriptions of the stages known as vibhāva, anubhāva, sāttvika, vyabhicārī and sthāyi-bhāva, all on this high platform of devotional service. Thus there are five waves in the dakṣiṇa-vibhāga division. In the western division (paścima-vibhāga) there is a description of the chief transcendental humors derived from devotional service. These are known as mukhya-bhakti-rasa-nirūpaṇa, or attainment of the chief humors or feelings in the execution of devotional service. In that part there is a description of devotional service in neutrality, further development in love and affection (called servitude), further development in fraternity, further development in parenthood, or parental love, and finally conjugal love between Kṛṣṇa and His devotees. Thus there are five waves in the western division.
In the northern division (uttara-vibhāga) there is a description of the indirect mellows of devotional service—namely, devotional service in laughter, devotional service in wonder, and devotional service in chivalry, pity, anger, dread and ghastliness. There are also mixing of mellows and the transgression of different humors. Thus there are nine waves in this part. This is but a brief outline of the Bhakti-rasāmṛta-sindhu.
The Vidagdha-mādhava is a drama of Lord Kṛṣṇa’s pastimes in Vṛndāvana. Śrīla Rūpa Gosvāmī finished this book in the year 1454 Śakābda (A.D. 1532). The first part of this drama is called veṇu-nāda-vilāsa, the second part manmatha-lekha, the third part rādhā-saṅga, the fourth part veṇu-haraṇa, the fifth part rādhā-prasādana, the sixth part śarad-vihāra, and the seventh and last part gaurī-vihāra.
There is also a book called Ujjvala-nīlamaṇi, a transcendental account of loving affairs that includes metaphor, analogy and higher bhakti sentiments. Devotional service in conjugal love is described briefly in the Bhakti-rasāmṛta-sindhu, but it is very elaborately discussed in the Ujjvala-nīlamaṇi. This book describes different types of lovers, their assistants, and those who are very dear to Kṛṣṇa. There is also a description of Śrīmatī Rādhārāṇī and other female lovers, as well as various group leaders. Messengers and the constant associates, as well as others who are very dear to Kṛṣṇa, are all described. The book also relates how love of Kṛṣṇa is awakened and describes the ecstatic situation, the devotional situation, permanent ecstasy, disturbed ecstasy, steady ecstasy, different positions of different dresses, feelings of separation, prior attraction, anger in attraction, varieties of loving affairs, separation from the beloved, meeting with the beloved, and both direct and indirect enjoyment between the lover and the beloved. All this has been very elaborately described.