The son of a high court judge is not virtually a high court judge, but there is no harm in addressing a high court judge’s son as a relative of the Honorable Justice. Therefore, as by birth only one does not become a high court judge, so also one does not become a brāhmaṇa simply by birthright but by acquiring the necessary qualifications of a brāhmaṇa. As the high court judgeship is a post for the qualified man, so also the post of a brāhmaṇa is attainable by qualification only. The śāstra enjoins that even if good qualifications are seen in a person born in a family other than that of a brāhmaṇa, the qualified man has to be accepted as a brāhmaṇa, and similarly if a person born in the family of a brāhmaṇa is void of brahminical qualification, then he must be treated as a non-brāhmaṇa or, in better terms, a relative of a brāhmaṇa.
Ref >> Srila Prabhupada Vani.