One may engage in any business — material or spiritual — but the purpose should be the satisfaction of the Supreme Personality of Godhead. This verse presents a perfect picture of Vedic civilization. People training to become devotees should be respectful not only to the Supreme Personality of Godhead but also to those who are elderly in knowledge, who are Aryans and actual devotees of the Lord. An Aryan is one who does not boast, but is an actual devotee of the Lord. Aryan means “advanced.” Formerly, those who claimed to be Aryans had to be devotees of the Lord.

Srila Prabhupada, SB 4.30.39-40, Purport