Chapter 2 the Metamorphosis

Gregor awakens at twilight, the moment when darkness is just covering the last light of day. Thus, the fact that Gregor has now been cut off from humanity is emphasized by the fact that he awakens in darkness. He has been isolated from everyone, a situation also brought out by the fact that his family now locks his doors from the outside and walks around on tip-toe so as to remain undetected by him.