I could almost more easily believe that...
6 seconds sound clip from the The Pit and the Pendulum (1961) movie soundboard.
You can hear this line at 00:37:29 in the Blu-ray version of the movie.
Quote context
[...]
- You seem to forget that we all heard the harpsichord playing.
- No, I have not forgotten it, sir.
- It is why I said before that I thought that no one but Nicholas and myself knew about this.
- I could almost more easily believe that...
- Nothing. I spoke without thought.
- I want to know one thing, sir. Are you absolutely positive that Don Medina's dread is unwarranted?
- If Elizabeth Medina walks the corridors of this castle, it is her spirit, not her living self.
[...]