The techniques used by Wallace use in the passage is appeal to pathos and repetition.
How can one appeal to pathos?
People do tend to be uninterested in some kind of issue but they can see a measure of a personal connection to it and so therefore, a communicator often uses some means to connect to his or her audience by bringing out their emotions.
It can also be done by author and audience sharing attitudes, beliefs, and values and so they are making an appeal to pathos.
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