Brāhmaṇas generally used to become astrologers, Āyur-vedic physicians, teachers and priests. Although highly learned and respectable, such brāhmaṇas went from door to door to distribute their knowledge. A brāhmaṇa would first go to a householder’s home to give information about the functions to be performed on a particular tithi, or date, but if there were sickness in the family, the family members would consult the brāhmaṇa as a physician, and the brāhmaṇa would give instruction and some medicine. Often, since the brāhmaṇas were expert in astrology, people would also be greatly inquisitive about their past, present and future.
Although brāhmaṇas would go door to door just like beggars, they were honored as very respectable guests. This system was current even one hundred years ago; such brāhmaṇas would visit householders like humble beggars, and people would derive great benefit from the mercy of such brāhmaṇas. The greatest benefit was that a householder could save a great deal of money from being spent on doctor bills because the brāhmaṇas, aside from explaining the past, present and future, could ordinarily cure all kinds of diseases simply by giving instructions and some medicine. Thus no one was bereft of the benefit of a first-class physician, astrologer and priest.
Ref >> Srila Prabhupada Vani.
Jagannath Puri Hare Krishna Movement 