Miss Havisham fell in love with a man from you lower class, then she was but on the day of their wedding her soon to be husband left at the alter. After that day she was extremely depressed and destroyed her on the inside. Miss Havisham decided to Adopt Estella to try and fill that hole in her heart. Miss Havisham raised Estella to talk harshly to all men and
taught her how to mess with guys hearts and break them in the worst ways possible. After Pip fell in love with Estella and she broke his heart Miss Havisham sees that raising Estella to hurt men doesn't make her feel any better about what has happened to her.
We meet Able at the very beginning of the book, but we don't learn his true identity till towards the end. In the beginning, we see him as a convict that scares Pip into helping him out, but we see a soft side in him when he sticks up for Pip about the pie. When Able is caught in the beginning, it is because he was fighting with a man on the marshes. Later on we find out that that man he is fighting with is named Compeyson. Compeyson was Ables partner when they were younger. When Compeyson and Able were caught though Compeyson used his wealth and higher social class to get him a lighter prison sentence. Ables goal from then on was to make sure that Compeyson stayed in prison for as long as possible.
After reading all of Great Expectations we see that sometimes revenge isn't all it's cracked up to be. With both Miss Havisham and Able revenge didn't do anything for them except hurt them even more. I think one of the many themes in Great Expectations in that sometimes it's better to put the past behind us and to move on from it.