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.
(Bhagavad-Gita---6:26---purport).

Being illusioned by the conditions of the external energy, one falsely thinks himself to be the served, but actually he is not served; he is servant of the senses like lust, desire, anger, avarice, pride, madness and intolerance.
(Srimad Bhagavatam---1:12:6---purport).

Only the impure conditioned living being cannot derive any pleasure from the senses, but being illusioned by false pleasures of the senses, he becomes servant of the senses.
(Srimad Bhagavatam---1:14:34---purport).

The Lord is not the servant of the senses, or, in other words, He is not directed by the dictation of the senses, but the conditioned souls or the individual living entities are servants of the senses.
(Srimad Bhagavatam---2:50:30---purport).

By becoming a servant of the senses, one becomes a great material hero, and by becoming master of the senses, he becomes a gosvāmī, or spiritual hero.
(Srimad Bhagavatam---4:25:25---purport).