I full well understand your feelings, but you're an officer of the army, a soldier, and desertion is punishable by death.
10 seconds sound clip from the Witchfinder General movie soundboard.
You can hear this line at 00:56:14 in the Blu-ray version of the movie.
Quote context
[...]
- Seems to me he's already had some of yours.
- Well, he's not going to have any more, you understand?
- You're forgetting our powers. He could be a witch.
- He's a man who's out to kill both of us.
- Then it appears to me that we should take steps to see to his death first.
- Come. We travel to Lavenham.
- One, we are grouped here at Naseby in preparation for a major assault on the Royalist armies.
- We need every man we can get. And you're a pretty good soldier, most of the time.
- Secondly, I would sleep ill if I had to send to the gallows a man who had saved my life.
[...]