How does Dickens use Joe and Pip's relationship to show how Pip has changed?

In the beginning of the novel, Pip is a mirror of his brother-in-law, Joe Gargery. He reflects his kindness, as is evidenced in the help he gives the escaped convict Magwitch, in spite of his fear. He looks to Joe for protection, though he has been dishonest in not telling Joe the full account of how he has aided Magwitch in his escape. Joe also does his best to protect Pip from Pip’s sister’s abuse. It is when Pip steps out of Joe’s protection, both in his help to Magwitch and in his visits to Miss Havisham and Estella, that Pip begins to change from what he was, a contented child whose future was to be in the profession that Joe will teach him during his apprenticeship. Pip’s shame of Joe’s rough and uncultured ways lead him along that path that will take him to London, as will his acceptance of the legacy given him by his unknown benefactor (whom he believes to be Miss Havisham but is actually Abel Magwitch). Pip’s rejection of Joe indicates that Pip has entered a life in which he is not really what he is meant to be. He wants to be a gentleman, but this is not the way he can successfully go about it. It is only through what Joe has taught him about character and integrity that will lead Pip to successful adulthood. When Pip rejects the legacy given him by Magwitch and leaves the life of a gentleman, who fulfills his destiny, which he now accepts. However, he becomes his own person, becoming a clerk instead of a blacksmith like Joe. Through this, he has brought about his own life, but with the virtues that have been instilled him by Joe from the beginning.