Pip's forgiveness and love from Joe, Biddy and Magwitch. He endures hardship and triumphantly emerges a mature, thoughtful person. The themes of Love, Isolation and Redemption are the structure the other themes hang from. Love is the backbone of the novel, the thing that binds the others together, redemption is its conclusion. There has to be love or the characters would not be able to interact, if there were only isolation each character's tale would be a separate piece of work.
All good novels have a moral to relate and involve love and redemption.
By Anne Gilmour. All comments would be welcome as I am studying for exams.