Why does it matter? I say good for him for believing in himself and believing he can truly change the world; it's a lot better than sitting around sulking. Do you think anyone who's been successful achieved that success by sitting around telling themselves "I can't do this"? He should have confidence in what he's doing; everyone should have confidence in what they're doing. If you don't, then why are you even doing it?
There is a difference between "changing the world" and trying really hard to sound like U2