The influence of a pure devotee is such that if someone comes to associate with him with a little faith, one gets the chance of hearing about the Lord from authoritative scriptures like Bhagavad Gita and Srimad Bhagavatam.
Simply becoming initiated does not elevate one to the position of a high-class brahmana. One also has to discharge the duties and follow the regulative principles very rigidly.
If after accepting the spiritual master and being initiated one does not follow the rules and regulations of devotional service, then he is again fallen.
A bona fide spiritual master, under the guidance of authorities, can turn anyone to the Vaisnava cult so that naturally he may come to the topmost position of a brahmana.