What makes one guy a champion and the other one not?

Good quote from California Governor Arnold Schwarzenegger, a seven-time Mr. Olympia, in Barbara Walters' autobiography: "What makes one guy a champion and the other one not?" [Walters] asked. Schwarzenegger: "It's drive. It's the will. There are certain people that grow up with a tremendous hunger and it's usually kids that have struggled when they were young. When you grow up comfortable and in peace and happiness, all those things will produce a very balanced person and a good person, but it will not create the will and determination and hunger that you need to be the best in the world."