Although Sri Advaita Prabhu is an incarnation of Visnu, for the welfare of the conditioned souls He manifested Himself as a servitor of the Supreme Personality of Godhead, and throughout all His activities He showed Himself to be an eternal servitor. Lord Caitanya and Lord Nityananda also manifested the same principle, although They also belong to the category of Visnu. If Lord Caitanya, Lord Nityananda and Advaita Prabhu had exhibited Their all-powerful Visnu potencies within this material world, people would have become greater impersonalists, monists and self-worshipers than they had already become under the spell of this age. Therefore the Personality of Godhead and His different incarnations and forms played the parts of devotees to instruct the conditioned souls how to approach the transcendental stage of devotional service. Advaita Acarya especially intended to teach the conditioned souls about devotional service. The word acarya means "teacher."The special function of such a teacher is to make people Krsna conscious. A bona fide teacher following in the footsteps of Advaita Acarya has no other business than to spread the principles of Krsna consciousness all over the world. The real qualification of an acarya is that he presents himself as a servant of the Supreme. Such a bona fide acarya can never support the demoniac activities of atheistic men who present themselves as God. It is the main business of an acarya to defy such imposters posing as God before the innocent public.