The Metamorphosis by Kafka

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…to something very un-human, he remains the model of humanity when compared to his family. Not only did the family leech from Gregor, society itself seemed to call upon Gregor not as a person, but to serve as a tool to satisfy their needs. Once transformed, Gregor no longer served well in this capacity. Rather, he became the one in need, and he quickly became more of a burden than he was worth to them.