The madhyama-vaisnava must serve each Vaisnava in accordance with his status. Only the uttama-vaisnava does not consider or analyse whether a Vaisnava is kanistha, madhyama, or uttama before he interacts with him. If a madhyama-vaisnava artificially adopts this mentality, he becomes an aparadhi, offender.
Sri Caitanya Mahaprabhu revealed these truths of Vaisnava etiquette in a very concise manner in His discussions with the residents of Kulina-grama. All His instructions on this topic are more significant for the madhyama-vaisnavas than the original Vedas. Actually, what is the definition of sruti — the Vedas? The answer: The words of the Supreme Lord are Veda.
– Bhaktivinoda Thakura’s Jaiva dharma Ch. 8: Nitya-dharma and Vaisnava Behaviour