Narada, the celestial musician, detail

Sri Narada sings:
"But Narada is of the opinion that the essential characteristics of Bhakti are the consecration of all activities, by complete self-surrender to Him [God], and extreme anguish if He were to be forgotten." (Narada Bhakti Sutras, v. 19)
see also at: http://www.narada-bhakti-sutras.blogspot.com/