I decided to read this book as a way to start my reading routine again after two months of hiatus because it is short, powerful,and delivers a message that is similar to the one I try for in my stories. 
 What I like about this books is how much thinking is going on inside Gregor's head.His attempts to rationalize everything the family is a way to help him or work things out, the way he thinks he has to help them all, and even though later when he saw they are doing well when push comes to shove (with the tenants and his father getting the job) he is still thinking of ways to help him. 
 Everything can be symbolic of course: the way the mother and the daughter move around furniture in his room, was a powerful image for me - it's as if they finally gave up on him completely. Gregor did not see how much he was used, throughout his human life (by paying his father's debt) or as a giant bug, and he ends up dead, starved to death because of negligence of the family and lack of care. A family which goes on a vacation as soon as he dies and decide to move on with their life immediately. 
 Don't end up like Gregor; make sure those you care for care about you as well. At least, that's the moral of the story to me.