"In the Caitanya-caritamrita you will find one passage, that 'Only master is Krishna, 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. Gopi bhartuh pada-kamalayor dasa-dasanudasah (Caitanya-caritamrita, Madhya-lila 13.80). Lord Caitanya, He said that 'I am not a brahmana. I am not a Christian. I am not a Hindu. I am not a sannyasi. I am nothing of this sort.' Then what You are? 'I am the servant's servant's servant of Krishna. That is My identification.' And when you identify yourself in that way, you are liberated. That is Krishna consciousness, perfection of Krishna consciousness."
(Srila Prabhupada lecture, New York, December 21, 1966)