CC Ādi 4.248

ei mata jagatera sukhe āmi hetu
rādhikāra rūpa-guṇa āmāra jīvātu
Word for word: 
ei mata — in this way; jagatera — of the whole world; sukhe — in the matter of happiness; āmi — I am; hetu — the cause; rādhikāra — of Śrīmatī Rādhārāṇī; rūpa-guṇa — beauty and attributes; āmāra — My; jīvātu — life and soul.
Translation: 
“Thus although I am the source of happiness for the entire world, the beauty and attributes of Śrī Rādhikā are My life and soul.