What kind of children can be happy for their whole lives? Is it going to be the rich kid or the well-behaved kid? Well, The Optimistic Child will tell you that optimism, interest, and good habits are the most precious qualities. If there is no interest, there will be no motive for self-development, and if there are no good habits, then there is nothing to secure self-development. And what is the foundation of enthusiasm and good habits? Optimism. Optimism is the mark of a successful education.