That's what you're doing here.
3 seconds sound clip from the TRON (1982) movie soundboard.
You can hear this line at 00:03:02 in the Blu-ray version of the movie.
Quote context
[...]
- Great. Another religious nut!
- I'd say, Welcome, friend, but not here, not like this.
- I don't even know what I'm doing here.
- Do you believe in the Users?
- Yeah, sure. If I don't have a User, then who wrote me?
- That's what you're doing here.
- Master Control Program's been snapping up all us programs who believe.
- If he thinks you're useful, he takes over all your functions so he gets bigger.
- If he can't use you, he sends you down here to the game grid get your bits blasted.
- Crom.
[...]