The nature of the mind is flickering and unsteady. But a self-realized yogī has to control the mind; the mind should not control him. One who controls the mind (and therefore the senses as well) is called gosvāmī, or svāmī, and one who is controlled by the mind is called go-dāsa, or the servant of the senses. A gosvāmī knows the standard of sense happiness. In transcendental sense happiness, the senses are engaged in the service of Hṛṣīkeśa, or the supreme owner of the senses—Kṛṣṇa. Serving Kṛṣṇa with purified senses is called Kṛṣṇa consciousness. That is the way of bringing the senses under full control. What is more, that is the highest perfection of yoga practice.
(Bhagavad-Gita-------6:26-----purport).

Self-control is actually achieved not by artificially stopping the senses from material enjoyment, but by becoming factually attached to the Supreme Lord by engaging one's unalloyed senses in the transcendental service of the Lord. The senses cannot be forcibly curbed, but they can be given proper engagement. Purified senses, therefore, are always engaged in the transcendental service of the Lord. This perfectional stage of sense engagement is called bhakti-yoga. So those who are attached to the means of bhakti-yoga are factually self-controlled and can all of a sudden give up their homely or bodily attachment for the service of the Lord. This is called the paramahaṁsa stage. Haṁsas, or swans, accept only milk out of a mixture of milk and water. Similarly, those who accept the service of the Lord instead of māyā's service are called the paramahaṁsas. They are naturally qualified with all the good attributes, such as pridelessness, freedom from vanity, nonviolence, tolerance, simplicity, respectability, worship, devotion and sincerity.
(Srimad Bhagavatam--------1:8:22--------purport).

The process of devotional service as it is recommended in The Nectar of Devotion will gradually elevate one from the material condition of life to the spiritual status, wherein the devotee becomes purified of all designations. The senses can then become uncontaminated, being constantly in touch with bhakti-rasa. When the purified senses are employed in the service of the Lord, one becomes situated in bhakti-rasa life, and any action performed for the satisfaction of Kṛṣṇa in this transcendental bhakti-rasa stage of life can be relished perpetually. When one is thus engaged in devotional service, all varieties of rasas, or mellows, turn into eternity. In the beginning one is trained according to the principles of regulation under the guidance of the ācārya, or spiritual master, and gradually, when one is elevated, devotional service becomes automatic and spontaneous eagerness to serve Kṛṣṇa. There are twelve kinds of rasas, as will be explained in this book, and by renovating our relationship with Kṛṣṇa in five primary rasas we can live eternally in full knowledge and bliss.
(Nectar of Devotion).

Devotional service to the Lord is rendered by all limbs or parts of the body. It is the transcendental dynamic force of the spirit soul; therefore a devotee is engaged one hundred percent in the service of the Lord. One can engage in devotional service when the senses of the body are purified in relation with the Lord, and one can render service to the Lord with the help of all the senses. As such, the senses and the action of the senses are to be considered impure or materialistic as long as they are employed only in sense gratification. The purified senses are engaged not in sense gratification but in the service of the Lord in toto. The Lord is the Supreme with all senses, and the servitor, who is part and parcel of the Lord, also has the same senses. Service to the Lord is the completely purified use of the senses, as described in the Bhagavad-gītā. The Lord imparted instructions with full senses, and Arjuna received them with full senses, and thus there was a perfect exchange of sensible and logical understanding between the master and the disciple.
(Srimad Bhagavatam--------2:3:20--------purport).

One has to actually transcend material goodness in order to understand. This is because the exchange of feelings between Rādhā and Kṛṣṇa is not a subject matter of this material world. Even the greatest mental speculator cannot understand this, directly or indirectly. Material activities are manifested either for the gross body or the subtle mind, but this exchange of feelings between Rādhā and Kṛṣṇa is beyond such manifestations and beyond intellectual mental speculation. It can only be understood by purified senses freed from all the designations of the material world. Those who have purified senses can understand these transcendental features and exchanges, but those who are impersonalists and who have no knowledge of spiritual senses can only discriminate within the scope of the material senses and thus cannot understand spiritual exchanges or spiritual-sensual activities. Those who are elevated by virtue of experimental knowledge can only satisfy their blunt material senses either by gross bodily activities or by mental speculation.
(Teachings of Lord Caitanya).

To attain the platform of pure devotional service, one has to become spiritually pure and attain the brahma-bhūta platform, which is beyond material anxiety and material discrimination. When one approaches pure devotional service after realizing Brahman, one becomes attracted by pure devotional service. At such a time, by rendering devotional service, one gets a spiritual body with purified senses.
sarvopādhi-vinirmuktaṁ tat-paratvena nirmalam
hṛṣīkeṇa hṛṣīkeśa-sevanaṁ bhaktir ucyate
(CC.2:19:117)
When one's senses are pure, one can render loving devotional service to Kṛṣṇa. A pure devotee can only remember Kṛṣṇa's transcendental qualities. Remembering them, he fully engages in the loving service of the Lord.

(Sri Caitanya caritamrta------2:24:111-------purport).