Srila Bhaktisiddhanta Sarasvati Thakura comments on this verse. Externally a devotee performs all the items of devotional service-sravana and kirtana-in nine different ways, and within his mind he always thinks of his eternal relationship with Krsna and follows in the footsteps of the devotees of Vrndavana. If one engages himself in the service of Radha and Krsna in this way, he can transcend the regulative principles enjoined in the sastras and, through his spiritual master, fully engage in rendering spontaneous love to Krsna. In this way, he attains affection at the lotus feet of Krsna. Krsna actually comes under the control of such spontaneous feelings, and ultimately one can attain association with the Lord.