Sam J. Miller said this quote

Every superhero, every Chosen One, goes through a painful and difficult process of Becoming. On this, all the relevant literature is in agreement. Ask any comic book aficionado, any movie buff. The heroes doubt themselves, even when confronted with irrefutable evidence. They've spent their whole lives listening to weak and powerless people who hate and fear anything that is different, who say that superhuman abilities simply don't exist, and they believe it.