If I'm going to move on this, there can't be the least little shred of doubt.
7 seconds sound clip from the The Shawshank Redemption movie soundboard.
You can hear this line at 01:37:27 in the Blu-ray version of the movie.
Quote context
[...]
- I think you can appreciate that.
- The right thing to do. Sometimes it's hard to know what that is. You understand?
- If I'm going to move on this, there can't be the least little shred of doubt.
- I have to know if what you told Dufresne was the truth?
[...]