You should not let others put you down.
Dave is in the library with his math tutor Jeremy, who just told Dave that he might as well quit trying to improve.
Dave wants to stop studying for the day.
Dave tells Jeremy that he isn't being supportive, nor is he filling his role as a helpful tutor, and says he will be finding a new tutor to learn from.
Dave says that Jeremy is probably right and packs his things to go home, feeling terrible about himself.
Dave is able to find a tutor who is patient and supportive, while Jeremy loses a client because of his bad attitude.
Dave loses ambition to continue learning and begins to suffer a lot academically.