There's a song we used to sing at youth group called "Screen Door". It goes somethin' like, "Faith without works is like a song you can't sing. It's about as useless as a screen door on a submarine."
Well, that's true. A screen door on a submarine doesn't do you any good. Same thing with faith. If you're not doing anything with your faith, it's useless. It's almost like you don't even have it. I've had that song stuck in my head all day.