What is The Theme of Metamorphosis?

The Metamorphosis is an allegorical story about a man who wakes up one day to find that he has transformed into a giant insect. It explores the theme of alienation and isolation through the main character, Gregor Samsa, who feels like he has been cut off from his family and friends after his transformation. The story also explores the themes of responsibility and guilt through Gregor’s father, whose sense of guilt over his son’s condition causes him to repress his emotions and prevent himself from speaking with anyone about it.
So the story is set in a world where the boundaries between humans and animals are blurred, which further emphasizes Gregor’s isolation from society. For example, one morning he finds himself walking around on four legs instead of two; he tries to hide this fact from his family but they still notice something strange about him when they look at him closely enough—his father even comments on how “strangely” Gregor looks in one scene!
The Metamorphosis is narrated by the main character, Gregor Samsa, who is telling us about his life through his eyes; therefore, we can only see things from his point of view. In other words, we will not get much information about what happens outside of Gregor’s room because he cannot see these things from where he is sitting or lying down most of the time (since he’s a bug).
It is set in a realistic and naturalistic style, which means that everything seems real and believable because it does not have any supernatural elements like magic or miracles happening throughout its plotline — everything seems normal for us humans living here on Earth!