CC Madhya 10.111

kṛṣṇa-rasa-tattva-vettā, deha — prema-rūpa
sākṣāt mahāprabhura dvitīya svarūpa
Word for word: 
kṛṣṇa-rasa — of transcendental mellows in relationship with Kṛṣṇa; tattva — of the truth; vettā — cognizant; deha — body; prema-rūpa — personified prema; sākṣāt — directly; mahāprabhura — of Śrī Caitanya Mahāprabhu; dvitīya — second; svarūpa — representation.
Translation: 
Śrī Svarūpa Dāmodara was the personification of ecstatic love, fully cognizant of the transcendental mellows in relationship with Kṛṣṇa. He directly represented Śrī Caitanya Mahāprabhu as His second expansion.