“Sri Krishna cannot enjoy anything that is internally different from Him. Therefore Radha and Sri Krishna are identical. The sandhini portion of Sri Krishna’s internal potency has manifested the all-attractive form of Sri Krishna, and the same internal potency, in the hladini feature, has presented Srimati Radharani, who is the all-attraction for the all-attractive. No one can match Srimati Radharani in the transcendental pastimes of Sri Krishna.”
(Caitanya-caritamrta Adi 4.71, Purport)