Śrīla Rūpa Gosvāmī is described as the bhakti-rasācārya, or one who knows the essence of devotional service
CC Adi 5.203, Purport: Krsnadasa Kaviraja Gosvami also, in the last section of the Caitanya-caritamrta, specifically mentions the names of Rupa Gosvami, Sanatana Gosvami and Srila Jiva Gosvami and offers his respectful obeisances unto the lotus feet of these three spiritual masters, as well as Raghunatha dasa. Srila Raghunatha dasa Gosvami also accepted Sanatana Gosvami as the teacher of the science of devotional service. Srila Rupa Gosvami is described as the bhakti-rasacarya, or one who knows the essence of devotional service. His famous book Bhakti-rasamrta-sindhu is the science of devotional service, and by reading this book one can understand the meaning of devotional service. Another of his famous books is the Ujjvala-nilamani. In this book he elaborately explains the loving affairs and transcendental activities of Lord Krsna and Radharani.