How does Pips feeling about marrying Estella change once he knows who his benefactor is?

Pip's feelings towards marrying Estella change once he discovers that his benefactor is not Miss Havisham, and instead it is Abel Magwitch, the convict he helped years ago. This revelation makes Pip reassess his priorities and he realizes the superficiality of his desire to be with Estella. He comes to understand that true wealth and happiness come from love and loyalty, leading him to reject his previous ambitions and focus on building genuine connections.