The repetition of the phrase Barkis initially used to propose with is interesting—particularly because it's the last thing Barkis ever says. What had been a running joke now signals Barkis's willingness to embrace death and presumably, given the cultural context of the novel, God. In other words, as comical as Barkis's and Peggotty's relationship often is, Dickens does suggest that it plays a role into shaping Barkis into the kind of man who can look forward to entry into heaven.