Srila Bhaktisiddhanta Sarasvati Thakura has commented: "Caitanya-caritamrta advises those who are neophytes to give up all kinds of motivated desires and simply engage in the regulative devotional service of the Lord according to the directions of scripture. In this way a neophyte can gradually develop attachment for Krsna's name, fame, form, qualities and so forth. When one has developed such attachment, he can spontaneously serve the lotus feet of Krsna even without following the regulative principles. This stage is called raga-bhakti, or devotional service in spontaneous love. At that stage the devotee can follow in the footsteps of one of the eternal associates of Krsna in Vrndavana. This is called raganuga-bhakti. Raganuga-bhakti, or spontaneous devotional service, can be executed in the santa-rasa when one aspires to be like Krsna's cows or the stick or flute in the hand of Krsna, or the flowers around Krsna's neck. In the dasya-rasa one follows in the footsteps of servants like Citraka, Patraka or Raktaka. In the friendly sakhya-rasa one can become a friend like Baladeva, Sridama or Sudama. In the vatsalya-rasa, characterized by parental affection, one can become like Nanda Maharaja and Yasoda, and in the madhurya-rasa, characterized by conjugal love, one can become like Srimati Radharani or Her lady friends such as Lalita and Her serving maids (manjaris) like Rupa and Rati. This is the essence of all instruction in the matter of devotional service."
(From Srila Prabhupada's purport to Nectar of Instruction verse 8)