He could leave at any time. If his was more than just a vague ambition, if he was absolutely determined to discover the truth, there's no way we could prevent him.
11 seconds sound clip from the The Truman Show movie soundboard.
You can hear this line at 01:07:41.735 in the Blu-ray version of the movie.
Quote context
[...]
- You really think you're in a position to judge him?
- He's not a performer. He's a prisoner. Look at him. Look at what you've done to him!
- That's where you're wrong. You're so wrong, and he'll prove you wrong.
- Yes. For Truman and for the viewing public.
- Well, Christof, I can't thank you enough, for giving so generously of your time tonight.
[...]