Radha's realationship shows that Krishna can be actually treated as one's lover. In this relationship the Lord is so much attached that He expresses His inability to reciprocate. Krishna was so obliged to Radharani that He felt unable to return Her love. "I cannot repay your love," He told Her. "I have no more assets to return." Thus devotional service is performed on this excellent platform, and knowledge of the devotee's relationship to Krishna as lover and beloved was given by Caitanya Mahaprabhu.