CC Madhya 8.279

rādhikāra bhāva-kānti kari’ aṅgīkāra
nija-rasa āsvādite kariyācha avatāra
Word for word: 
rādhikāra — of Śrīmatī Rādhārāṇī; bhāva-kānti — ecstatic love and luster; kari’ — making; aṅgīkāra — acceptance; nija-rasa — Your own transcendental mellow; āsvādite — to taste; kariyācha — You have made; avatāra — incarnation.
Translation: 
Rāmānanda Rāya continued, “My dear Lord, I can understand that You have assumed the ecstasy and bodily complexion of Śrīmatī Rādhārāṇī. By accepting this, You are tasting Your own personal transcendental humor and have therefore appeared as Śrī Caitanya Mahāprabhu.