Metamorphosis

I believe Gregor's death symbolized the setting free of the family.  After his death they were able to leave the house without having to worry about what Gregor might do, or what might happen if they all leave.  "Then all three of them left the apartment together, something they hadn't done for months, and took the trolley out to the country on the edge of town" (Kafka 52).  If Gregor had never passed away the family would still be living in fear of him, yet taking care of him because he is still their son and they have hope that he will soon return back to his old self.