When the holy name of Krsna enters within Srimati Radharani's ear, She becomes perturbed, thinking, "Is a name as sweet as this possible within this world?" This is Her reaction, and She experiences pain also. She feels, "I can't meet Him." A pang of separation comes within Her heart. That is purva-raga, the pain of separation that comes before meeting.

Sri Srimad Bhaktivedanta Narayana Maharaja
Venu-Gita © 1995 Sri Gaudiya Vedanta Samiti