The book short story is Edgar Allen Poe’s “The Tell Tale heart”.
In the story The Tell-Tale Heart the main Character struggles with guilt for murdering someone. This guilt is an example of Man vs Himself. In the end the man’s guilt drives him near mad and he is caught. This guilt is an internal struggle that he loses.
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Here is a sentence I made, he was indignant at being the object of suspicion
It would be D many American soldiers got really encouraged by their religion, they would even have talks about how the war emotionally destroyed them, such like therapy these days but back then it was mostly about religion and if god would accept them after all the things they have done. So religion was a big part of motivating the soldiers