Very few people can be totally ruthless. It isn't easy. It takes more strength than you might believe.
9 seconds sound clip from the Enter the Dragon (1973) movie soundboard.
You can hear this line at 01:10:35 in the Blu-ray version of the movie.
Quote context
[...]
- You want me to put my head on that thing?
- I'm a man of little faith, Mr. Han.
- Then there is a point you will not go beyond.
[...]