Originally Posted by
hanzklein
If you ask me, the reason for Gregors' insect transformation is a metaphor for a crippling illness. The characteristics of Gregor are spot on for anyone who has been considerably ill and nauseous before. For example his difficulty in maneuvering, his disgust at milk which he used to love and his inability to speak properly. Kafka himself had Tuberculosis if I remember right, maybe he based this story on his experience. Something else supporting this is how often sickness is mentioned in the story. Also, the view outside of his window of the hospital disappears - a hospital is a place which cures illness. There's more to the story though, the painting could represent the fall of man with the snake around the womans' neck and also references Venus in Furs, an interesting book to reference in this story considering its nature. His father also pelts him with apples, perhaps another reference to adam & eve.
I've only read little outside of the main text which I just finished today, I plan to read more criticisms, essays and analyses sometime soon.
Edit: and about the ending, that's definitely quite puzzling and thought provoking. It seems a weird way to end the book. But about the maid, she symbolizes a cleaner. Maids are paid to clean, and she pokes pokes Gregor with a broom as a joke. A broom, as we all know, is a an item used to clean up messes. The maids ambiguity about how she disposed of him leaves an enormous room for pondering what it could mean. Even more puzzling is what it means when Grete transformed into a beautiful young woman by the end. I have some thoughts on this, but I'll leave it out.