“- Lucien Cordier: What's wrong? You know I have to.
- Vendredi: But Captain, I trusted you. You're different from other white men.
- Lucien Cordier: There's your mistake.”

Philippe Noiret - Lucien Cordier
Samba Mané - Vendredi - un noir qui en sait trop

You said hadn't. That's badgrammar. You should have said, "You haven't been a trustworthy person".

Meryl Streep - Aunt Josephine

“- Alden Pyle: I trusted you. Thomas.
- Thomas Fowler: Always a mistake with a woman involved.”
Brendan Fraser - Alden Pyle
Sir Michael Caine - Thomas Fowler

“- Roger Murtaugh: I got 8 days to my retirement, and I will not make a stupid mistake!
- Martin Riggs: Look, there is no bomb in that building! I will bet vital parts of my anatomy to the fact! Trust me, okay? Trust me!
- Roger Murtaugh: That's usually my first mistake!”
Danny Glover - Roger Murtaugh
Mel Gibson - Martin Riggs

“You know who gave Hitler his power? The clerks and the bookkeepers, the civil servants. I have this one weakness: I believe in a just God. I always seem to err on the side of democracy. No matter what anyone tells you there'll be no one you can really trust. I'm afraid when all is said and done we're all just clerks too.”

Robert De Niro - Bill Sullivan