Having already discussed the superexcellent qualities of the transcendental mellowness known as madhurya-prema and Sri Krsna’s inability to repay the service of the spotlessly pure-hearted cowherd girls of Vraja, Ramananda then proceeded further in the same line in an attempt to discuss the service rendered by Srimati Radharani, the topmost servitor among all the cowherd girls.
Sri Krsna, the Absolute Supreme Personality of Godhead, is the full-fledged ananda-cinmoya-rasa-ujjvala-vigraha: His eternal form fully displays transcendental existence, knowledge, and bliss by His own internal potency called the hladini-sakti. Srimati Radharani is the controlling Deity of that joyous energy of Godhead. The joyous nature of Sri Krsna’s energy and Sri Krsna Himself are identical, but They appear separately for the purpose of enjoying each other. Therefore, Sri Sri Radha-Krsna are two component parts of the same divine entity. Without Srimati Radharani, Krsna is incomplete; and without Sri Krsna, Radharani is incomplete. Thus these two cannot be separated from one another. They combine as one in Sri Caitanya Mahaprabhu to fulfill this transcendental truth.
[Excerpted from the Bhaktivedanta VedaBase 2011.1]