Fr. James V. Schall professor emeritus of government and political philosophy at Georgetown once observed that there are three kinds of students: those who know everything, those who care only about their grades, and those who are eminently teachable. He also noted that an education is often about whether one has one's soul in order: those whose souls are not in order will not see great things.
A quote I think fits Ophelia's view on Hamlet very well. Hamlet changes from what Ophelia believed to be a man who loved her into someone who has lost his mind who she must no longer love. He claims their relationship was a lie, and then tells Ophelia to "get thee to a nunnery" and "trust no man", letting her know she should stop believing in him, even if it hurts.