What is a good thesis statement for the following topic from The Great Divorce? Characters struggle, and in some cases, suffer with the aftermath...

Almost all of the ghosts from Chapters 2-10 in The Great Divorce suffer because of their poor choices.  Choose two or three of those characters and focus on them.  If you try to address too many characters, your paper will not have depth.  Here's an example:

"In C.S. Lewis's The Great Divorce, characters such as Pam, Robert's Wife, and Frank the Tragedian face bitterness, loneliness, and an eternity of disatisfaction because of their poor decisions."