We should not think that we can progress in devotional service if we are chanting mechanically. Bhakti cannot be generated by a mechanical process. Bhakti is eternal, which means that it has neither beginning nor end. Therefore, as Rupa Gosvami desribes, “Such devotion eternally exists within the heart of every living entity.” What will awaken that devotion? Our bhakti is awakened by coming in contact with the bhakti in the heart of a devotee. What will increase that bhakti? Continued association with bhakti will increase bhakti. Therefore, our sadhana bhakti must be executed WITH A DESIRE TO INCREASE OUR BHAKTI. If we forget to execute our sadhana bhakti in this consciousness, then we must daily hear as well.
MKV, Vol 2- Pg 17,(Letter From Niranjana Swami)