Reaching Life's Perfection
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engage not only one's mind but one's senses. Engage the senses in the service of the master of the senses. These three Sanskrit words are very significant.  Hṛṣīkeśa  means "the Lord of the senses." So  bhakti-yoga  means to serve with the senses the Lord of the senses. The Lord of the senses is Kṛṣṇa. We should always remember that we have our senses because we wanted to enjoy this material world, and therefore the Lord has given us a particular set of senses for our enjoyment. The hog has a particular type of body and senses because he wanted to enjoy eating stool. Similarly, a man has a particular type of body and senses because he wanted to enjoy something else. We have a particular set of conditioned senses with which to enjoy this material world, and this is what we have to purify. Our senses are original, but now they are covered by material desires. We have to cure ourselves and become free from such desires. When one's senses are no longer inclined toward material sense gratification, one's status is called pure devotion.
From this verse of the  Nārada-pañcarātra , we can understand that the spirit soul has original senses. However small a body it may have entered, the spirit soul is not impersonal; it has senses. Perhaps one may find a bug on one's book. It is so small, smaller than a pinpoint, but still it moves; it has all the senses. The small bacteria also move, and they have their senses. Originally, all living entities have senses. It is not that the senses have developed under certain material conditions. The atheistic theory is that under material conditions we have developed senses, that in the spiritual condition there are no senses, and that we are impersonal. By logic and reason, however, that cannot be so. A minute particle of spiritual force, even if it is smaller in size than an atom, has its senses. These senses, being covered by material elements, manifest themselves in a perverted way. We have to purify the senses, and when the senses are purified, we can engage them for the pleasure of the master of senses. Kṛṣṇa is the master and proprietor of the senses. Therefore, because we are part and parcel of the Supreme Lord, our senses are borrowed from Him; they are on rental. The best thing is to use the senses for His sense satisfaction, and not for our own. This is the process of pure Kṛṣṇa consciousness.
From the  Śrīmad-Bhāgavatam , Lord Caitanya gives an example of pure devotion: it is said in the  Bhāgavatam  that Kṛṣṇa is situated in everyone's heart. Therefore, just as rivers flow and their natural tendency is to reach the sea, so as soon as one hears the glories of the Lord, his soul is at once attracted toward the Supreme Lord. This is the beginning of pure devotional service. As soon as there is the chanting vibration, Hare