Pollyanna, Eleanor Porter’s best selling novel (1913) is based on a little girl named Pollyanna and her glad game. The book was so popular that Pollyanna soon became a term for someone with an optimistic outlook!
For writers optimism is a two bladed sword. Being optimistic could motivate us to explore ourselves for unknown talent. Optimism could also motivate us to do more search and research to learn something new. However it could also make us set unrealistic goals and get demotivated as soon as we learned that our goal is unrealistic.