From John Steinbeck:
“I believe that there is one story in the world, and only one. . . . Humans are caught—in their lives, in their thoughts, in their hungers and ambitions, in their avarice and cruelty, and in their kindness and generosity too—in a net of good and evil. . . . There is no other story. A man, after he has brushed off the dust and chips of his life, will have left only the hard, clean questions: Was it good or was it evil? Have I done well—or ill?”
kevinwarstadt.com 
I have heard this–there is only one story told over and over in different ways–and think about it often. To think of that story as the conflict between good and evil makes a lot of sense.
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