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In John Steinbeck's Of Mice and Men, the conversation that George and Lennie have had over and again refers to the "story" George tells Lennie about the home they will share one day.
Three quotations that indicate this are as follows:
[George] repeated his words rhythmically as though he had said them many times before.
You got it by heart. You can do it yourself.
Why'n't you do it yourself? You know all of it.
I believe there are three reasons for the repetition of the "story." Lennie is mentally challenged, so at first the repetitions might have served to help him remember the "story." Because of Lennie's child-like mentality, he loves listening to the story over and again. The third reason is directly related to the second: the constant repetition also serves to present the "story" as a fairytale, something a child believes when he is very young and can suspend his or her belief in the possibilities the story puts forth. However, because their situation is so difficult, what might seem a realistic dream to some, remains a fairytale to these two men who always seem to need to move on, without the opportunity to "settle down."