That's the way it works - Three Kings

Archie Gates: You're scared, right?
Conrad Vig: Maybe.
Archie Gates: The way it works is, you do the thing you're scared shitless of, and you get the courage AFTER you do it, not before you do it.
Conrad Vig: That's a dumbass way to work. It should be the other way around.
Archie Gates: I know. That's the way it works.

Movie: Three Kings.
Quotes taken from IMDB Memorable Quotes