CC Adi-lila 04.045 - BRS 2.5.38
Sri Caitanya-caritamrta
CC Adi-lila
CC Adi 4.45, Translation and Purport:
"Increasing love is experienced in various tastes, one above another. But that love which has the highest taste in the gradual succession of desire manifests itself in the form of conjugal love."
This is a verse from Śrīla Rūpa Gosvāmī’s Bhakti-rasāmṛta-sindhu (2.5.38).