Never underestimate a man because you don't like him.
5 seconds sound clip from the The Big Knife (1955) movie soundboard.
You can hear this line at 00:24:54 in the Blu-ray version of the movie.
Quote context
[...]
- We are not in a bargaining position with Stanley...
- But I'd do anything you ask me, within my power, as the good Lord sits above.
- Just get me out of here, Nat.
- Stanley wouldn't let you go.
- Suppose I just tore up the contract, and we moved away?
- What would he do? God forbid what he would do.
- Never underestimate a man because you don't like him.
- I know Stanley since before he had his fingers manicured every day.
- We've got no choice. You know what he's got on you. That thing we don't talk about?
- Darling... You sign, or you go to jail.
[...]