CC Antya 18.9

ei-mata rāsa-līlāya haya yata śloka
sabāra artha kare, pāya kabhu harṣa-śoka
Synonyms: 
ei-mata — in this way; rāsa-līlāya — in the pastimes of the rāsa-līlā; haya — there are; yata śloka — as many verses; sabāra — of all of them; artha kare — He explains the meaning; pāya — gets; kabhu — sometimes; harṣa-śoka — happiness and lamentation.
Translation: 
In this way, He explained the meaning of all the verses concerning the rāsa-līlā. Sometimes He would be very sad and sometimes very happy.