Answer:
At the beginning of the story, when Gregor easily accepts his transformation into a giant insect, his character takes a mental shift at this point in the story.
The motivation for this shift was his aloofness from society, his work, and even his own family.
Step-by-step explanation:
'The Metamorphosis' is a very creative piece of literary work by Franz Kafka. The story is about Gregor Samsa, a travelling salesman, who, at the beginning of the story, is found to be transformed into a giant insect.
At this point, when Gregor wokes up from his sleep, he finds himself being turned into a giant insect. The fact that he remains unchanged by this transformation is dubious. He easily accepts this transformation, but there is a mental shift that takes place in the character.
Gregor Samsa begin to distance himself from human things. This is evident when he looks at the size of his room and calls it 'regular human bedroom'. This suggests that by calling his bedroom a regular human bedroom, he began distancing himself from anything human.
The motivation of his distancing himself from human world is evident when his aloofness from people at work, in society, and also at his home. Gregor's colleagues are people who barely are fond of him or his presence, they would say things on his back. He is also alienated from his family, except his sister.