In his Bhakti-rasāmṛta-sindhu-bindu, Śrīpāda Viśvanātha Cakravartī Ṭhākura has briefly explained the path of rāgānuga-bhakti (spontaneous loving devotion). He has given a more detailed description of the same subject matter in this book, presented in two illuminations. In the First Illumination, he ascertains the paths of vaidhī and rāgānuga-bhakti.
The Second Illumination presents concepts in relation to Śrī Kṛṣṇa’s aspects of supreme opulence (aiśvarya) and consummate sweetness (mādhurya). Also described are the principles of Kṛṣṇa’s sarvajñatā (omniscience) and mugdhatā (quality of being charmingly oblivious and captivated), the concepts of svakīya (marital love) and parakīya (paramour love), the types of cherished eternal forms attained by rāgānuga devotees upon ascending to the realm of perfected divine love (prema), the authority of the Yogamāyā potency, and so on.Raga-vartma-candrika - Śrīla Gurudeva_2nd_ed