Answer:
The door is many things in Franz Kafka's The Metamorphosis. When Gregor Samsa turns into a beetle, it is the door that keeps his secret. ... Because of Gregor's transformation, Kafka uses the door as a barrier to showcase Gregor's physical changes. The door is no longer accessible for him; it determines his livelihood.
Explanation:
Gregor's transformation completely alters his outward appearance, but it leaves his mind unchanged, creating a discord, or lack of harmony, between his mind and body. ... As Gregor becomes accustomed to his new body, his mind begins to change in accordance with his physical needs and desires.
Gregor Samsa's story is a metaphor for sacrifice. ... Indirectly, Gregor's sacrifice that leads to his own destruction also gives his family the strength to leave their passive existence and take control of their lives.