Leap Of Faith is a conflicted movie.
A cynical look at manufactured religion transforms into something else.
Crippled teenager Boyd (Lukas Haas) interacts with Jonas Nightingale (Steve Martin) when a miracle show experiences what seems to be a miracle:

Jonas:
Look, I run a show here. It’s a lot of smoke and noise and it’s strictly for the suckers. I’ve been pulling one kind of scam or another since I was your age, and if there’s one thing I know it’s how to spot the genuine article because that’s what you’ve got to watch out for. Not the cops, you can always get around the cops. But the one thing you can never, ever get around is the genuine article, and you, kid, are the genuine article.
Boyd:
Are you saying you think you’re a fake?
Jonas:
I know I’m a fake.
Boyd:
Well, what difference does it make if you get the job done?
Jonas:
Kid, it makes all the difference in the world.

One of my friends from college days and I used to wonder about working the phrase ‘aluminium siding’ into one of our sermons, but to the best of my knowledge neither of us ever did.