My favorite quote from Walk the Line, from the movie's IMDB memorable quotes page:
Sam Phillips: Bring... bring it home? All right, let's bring it home. If you was hit by a truck and you was lying out there in that gutter dying, and you had time to sing *one* song. Huh? One song that people would remember before you're dirt. One song that would let God know how you felt about your time here on Earth. One song that would sum you up. You tellin' me that's the song you'd sing? That same Jimmy Davis tune we hear on the radio all day, about your peace within, and how it's real, and how you're gonna shout it? Or... would you sing somethin' different. Somethin' real. Somethin' *you* felt. Cause I'm telling you right now, that's the kind of song people want to hear. That's the kind of song that truly saves people. It ain't got nothin to do with believin' in God, Mr. Cash. It has to do with believin' in yourself.