in my view, the joseph story is just a bigger version of the same story as jacob and esau. and when you think about it the story of jacob and esau has similarity to the temptaion in the garden of eden. there is an offer of advantage according to this world, and the price to pay in both cases is ludicrously bad. in a way adam and eve give up a "birth right" to eternity just as esau gives up his birth right to his inheritance
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