In this short paragraph, Jason reveals much of his characteristics. Although he appeals to his mother and fuels her belief that he is her final hope, in reality he cares little for her. He consistently lies to her, especially regarding the money sent by Caddy, which his mother fears is succumbing to sin. He believes that the entire household relies on his good conscious, which is not entirely false. He continues his father's belief of self superiority, and condemns any Jews, blacks, and anyone who lives a different lifestyle than he.
Throughout Jason's narrative, it is apparent that he is aggressive. He is violent with Miss Quentin, and disregards Caddy as a former relative. He does not hesitate to be violent with Dilsey, and does not care for the wellbeing of others.
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Jason values solely his personal appearance. He claims that Miss Quentin should be more grateful towards his treatment of her, that he hadn't thrown her out yet. He constantly condemns her, claiming she is responsible for his poor public image, and why he lost his first job.
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Despite his good nature in his mother's presence, he does little to maintain it outside of her influence. He has actively chosen to rob Caddy of her money to Miss Quentin for the past 12 years. He has no morals, and respects few people, if any. He has a tendency to hate populations of people, though with little knowledge and filled with pure prejudice.