CC Madhya 2.80
yatneha āsvāda nā haila
śrī-rādhāra bhāva-sāra, āpane kari’ aṅgīkāra,
sei tina vastu āsvādila
pūrve — formerly; vraja-vilāse — in the pastimes of Vṛndāvana; yei tina — those three; abhilāṣe — in desires; yatneha — by great endeavor; āsvāda — taste; nā haila — there was not; śrī-rādhāra — of Śrīmatī Rādhārāṇī; bhāva-sāra — the essence of the ecstasy; āpane — personally; kari’ — making; aṅgīkāra — acceptance; sei — those; tina vastu — three subjects; āsvādila — tasted.
During His previous pastimes in Vṛndāvana, Lord Kṛṣṇa desired to enjoy the three different types of ecstasy, but despite great endeavor, He could not taste them. Such ecstasies are the monopoly of Śrīmatī Rādhārāṇī. Therefore, in order to taste them, Śrī Kṛṣṇa accepted the position of Śrīmatī Rādhārāṇī in the form of Śrī Caitanya Mahāprabhu.