Although David still lacks a clear sense of purpose in life, his concern over the cost of becoming a proctor is a promising sign: it suggests that he will be careful and disciplined when it comes to saving money. Meanwhile, Miss Betsey's desire to do right by David underscores a central idea of the novel: that, as Miss Betsey herself says, "It's in vain […] to recall the past, unless it works some influence upon the present." Although Miss Betsey regrets her prior harshness to David’s mother and father, she doesn't wallow in guilt, but instead turns her feelings to good use by dedicating herself to raising their son well and kindly.