Real heroes strive for the imperishable trophies (rewards that endure forever, such as love, personal growth, a sense of accomplishment, knowledge that they have changed their world for the better). Their rules and goals are different. They live and work in the world, but they embrace the eternal values of love, joy, peace, patience, kindness, goodness, faithfulness, humility, and self-control. While fame, fortune, and power may come their way, attaining them is not their goal. Heroes who deserve biography, autobiography or memoir are people who may attract attention, but direct that attention beyond themselves to something greater. (Why does Superman save people? Is he trying to be famous, or does he just want to help? Does the fact that his true identity is hidden help you answer those questions?) True heroes help us aspire and live up to the values they embrace in their daily lives.
This definition is from "How to Choose a Hero" from My Hero.com at https://myhero.com/Hosted/pdf/How%20To%20Choose%20a%20Hero.pdf