As per the story, Krishna saw huge preparations for the annual offering to Indra and questions his father Nanda about it. (He debated with the villagers) They were farmers, they should do their duty and concentrate on farming and protection of their cattle. He continued to say that all human beings should merely do their 'dharma', to the best of their ability and not pray or conduct sacrifices for natural phenomenon. The villagers were convinced by Krishna, and did not proceed with the special puja (prayer). Indra was then angered, and flooded the village. Krishna then lifted Mt Govardhan and held it up as protection to his people and cattle from the rain. Indra finally accepted defeat and recognized Krishna as supreme. This aspect of Krishna's life is mostly glossed over - but it actually set up on the basis of the 'karma' philosophy later detailed in the Bhagavat Geetha.
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