Varnas: The Four Pillars of Dharma
All of man’s activity is directed towards attaining that what is pleasant to him and preventing that which makes him suffer....Even then the Vedic Karma could not be performed....This is how and why Dharma was created, the four Varnas being in a sense its four pillars....Consider the amount of virtues expected of a Brahmin performing sacrifices for others....The king, who, even though he takes taxes from his people, remains oblivious to their protection, is considered a great sinner....He is fully entitled to the knowledge of Vedanta....Karmas like Vedic sacrifices etc. destroy the negative residue of sins accumulated by us over our many births....This is called working like a servant under God.
