CC Madhya 8.307

‘rasa-tattva-jñāna’ haya ihāra śravaṇe
‘prema-bhakti’ haya rādhā-kṛṣṇera caraṇe
Synonyms: 
rasa-tattva-jñāna — transcendental knowledge of the humors of conjugal love between Rādhā and Kṛṣṇa; haya — is; ihāra — of this; śravaṇe — by hearing; prema-bhakti — pure love of Godhead; haya — becomes possible; rādhā-kṛṣṇera caraṇe — at the lotus feet of Rādhā and Kṛṣṇa.
Translation: 
By hearing the talks between Rāmānanda Rāya and Śrī Caitanya Mahāprabhu, one becomes enlightened with the transcendental knowledge of the mellows of Rādhā and Kṛṣṇa’s pastimes. Thus one can develop unalloyed love for the lotus feet of Rādhā and Kṛṣṇa.