Chandra wants to associate with people of a lower caste and her mother refuses to allow her to do so.
The mother explains to her daughter that the Brahmans are different from other Indians in the way that they are more educated and know more about the Hindu religion.
The mother explains that it is important for Hindus to follow the jobs of their parents to preserve the social order of society.
The mother cares who her daughter marries because whoever Chandra marries, she and her parents will become a part of the groom's caste.
The mother explains that those who break the rules of the Hindu religion are cursed, punished by the Gods, and born to a body of a lower caste system in the next life.
After the Brahmans are dead, their souls are released from the wheel of life. They are guaranteed the opportunity of never having to return to Earth.
Equal opportunity is a feature of American Democracy. It is not fully possible to have a democratic government together with a caste system because in a democracy, the government functions "in favor of the people" who are all seen as equal no matter their socioeconomic status. The caste system separates people by their socioeconomic status and limits them to that section for generations.