Srila Sanatana Gosvami explained the mood of this prayer in Brhad-Bhagavatamrta. The devotee does not fear taking any birth. For example, although Vrtasura took birth as a demon, he was always glorifying Krsna's pastimes...
hare kṛṣṇa hare kṛṣṇa kṛṣṇa kṛṣṇa hare hare hare rāma hare rāma rāma rāma hare hare