I can't remember the movie. I think it was a Western, but I could be wrong, but the protagonist says something like, "I've found that someone who means you harm will usually tell you what he's about to do before he does it."
Anyone?
Closest I can think of is Open Range - Costner's bit:
Charley Waite :
Weren't the only thing he said. Most time, a man will tell you his bad intentions if you listen, let yourself hear.
