CC Madhya 8.164

sei mahābhāva haya ‘cintāmaṇi-sāra’
kṛṣṇa-vāñchā pūrṇa kare ei kārya tāṅra
Word for word: 
sei — that; mahā-bhāva — supreme ecstasy; haya — is; cintāmaṇi-sāra — the essence of spiritual life; kṛṣṇa-vāñchā — all the desires of Lord Kṛṣṇa; pūrṇa kare — fulfills; ei — this; kārya — business; tāṅra — Her.
Translation: 
“That supreme ecstasy of Śrīmatī Rādhārāṇī is the essence of spiritual life. Her only business is to fulfill all the desires of Kṛṣṇa.