In this connection, there is a story in the Skanda Purāṇa about a hunter who was converted into a great devotee under the instruction of Nārada Muni. When the hunter became a perfect devotee, he was not prepared to kill even an ant. Parvata Muni, a friend of Nārada's, saw the wonderful transformation of the hunter by devotional service and remarked, "My dear hunter, your unwillingness to kill even an ant is not very astonishing. Any person who develops the devotional attitude has all the good qualities automatically manifested in his person. A devotee is never a cause of distress to anyone."
Śrī Rūpa Gosvāmī affirms herein that purification of consciousness, purification of bodily activities, austerities, peace of mind, etc., all become automatically manifest in the person who is engaged in devotional service.