There are two kinds of servants: the māyā's servant and Kṛṣṇa's servant. Nobody is master. That is illusion. Everyone is servant. Every living entity is a servant. As enunciated by Caitanya Mahāprabhu, jīvera svarūpa haya nitya-kṛṣṇa-dāsa (CC Madhya 20.108-109): "The real, constitutional position of the living entity is eternal servant of Kṛṣṇa."
When he does not render service to Kṛṣṇa, under false prestige . . . just like somebody says: "The Vaiṣṇava religion is slave mentality." "Vaiṣṇava religion is slave mentality. They want to be servant." So the rascals do not know that, "What you have gained by master mentality?" You are simply servant of your senses. But they criticize that Vaiṣṇava is a slave man.
Everyone is slave. Somebody is slave of the senses, and somebody is slave of Kṛṣṇa. Nobody is master. That is illusion. Kāmādīnāṁ kati na katidhā pālitā durnideśāḥ (CC Madhya 22.16, (Brs 3.2.35). The slaves of the senses, they are following the dictation of the senses, and abominable activities they are doing. Just like Ajāmila. He was a Brahmin. He was a slave of Nārāyaṇa, a slave of Kṛṣṇa, Brahmin Vaiṣṇava. Brahmin means . . . a Brahmin, qualified Brahmin, means he is a Vaiṣṇava. Tad viṣṇoḥ paramaṁ padaṁ paśyanti sadā sūrayaḥ (Ṛg Veda 1.22.20). Sura. Brahmins' another name is sura.