CC Antya 5.73

mora mukhe kathā kahena āpane gauracandra
yaiche kahāya, taiche kahi, — yena vīṇā-yantra
Word for word: 
mora mukhe — in my mouth; kathā — topics; kahena — speaks; āpane — personally; gaura-candra — Lord Śrī Caitanya Mahāprabhu; yaiche kahāya — as He causes to speak; taiche kahi — so I speak; yena — like; vīṇā-yantra — the stringed instrument called the vīṇā.
Translation: 
“ ‘Whatever I speak is personally spoken by Lord Śrī Caitanya Mahāprabhu. Like a stringed instrument, I vibrate whatever He causes me to speak.