In the Caitanya-caritāmṛta you will find one passage that "Only master is Kṛṣṇa, and everyone—never mind what he is—is servant. Is servant." Everyone is servant. And what to speak of us. We are servant's servant's servant. Therefore anyone who understands this philosophy that, "I am servant's servant's servant's servant, hundred times, million times lower servant," he is a liberated person. And one who thinks that "I am God," he is a dog. He is a dog. And one who thinks, "I am servant, God's servant's servant's servant, million times servant's servant," he is liberated. He is liberated. This is the process. Gopī bhartuḥ pada-kamalayor dāsa-dāsānudāsaḥ (CC Madhya 13.80).
Lord Caitanya, He said that "I am not a brahmin. I am not a Christian. I am not a Hindu. I am not a sannyāsī. I am nothing of this sort." Then what You are? "I am the servant's servant's servant's servant of Kṛṣṇa. That is My identification." And when you identify yourself in that way, you are liberated person. That is Kṛṣṇa consciousness, perfection of Kṛṣṇa consciousness.