If you work hard you will find success. Persistence leads to success is a comforting truism, because we feel the future is under our own control. Work hard, you win.
An episode of a Freakonomics podcast provides a strong, economically sound argument for sometimes giving up. But you’ll be hard pressed to find a book for which encourages quitting. When a child character quits a sports team or skips out on piano, it will probably be because they’ve replaced their parents’ dream with another hobby of their own. Quitting to hang out on the corner? Hard to find that in a non-tragic story.