CC Antya 18.6

prabhu premāveśe karena gāna, nartana
kabhu bhāvāveśe rāsa-līlānukaraṇa
Word for word: 
prabhu — Śrī Caitanya Mahāprabhu; prema-āveśe — in ecstatic love; karena — does; gāna — singing; nartana — dancing; kabhu — sometimes; bhāva-āveśe — in ecstatic emotion; rāsa-līlā — the rāsa-līlā dance; anukaraṇa — imitating.
Translation: 
He sang and danced in ecstatic love and sometimes imitated the rāsa dance in emotional ecstasy.