- Father Brown: Doctor, there's a very good reason why a man of my trade should keep things to himself when he's not sure of them... because its his duty to keep them to himself when he is sure about them.
- Father Brown: [to Rev. Bohun] I often think that while we have the best church, you have the best churches. It's very annoying.
- Elizabeth Barnes: If I died today, I'd go to Hell! I know that!
- Colonel James Bohun: Quite right. The company's better there.
- Father Brown: You know, our people have a personal interest in old English churches.
- Doctor Wynn: ...and murder?
- Father Brown: As a sin, yes. Also I must confess a private weakness for puzzles.
- Colonel James Bohun: [taunting the village idiot] Which would you prefer - - a thrashing or a shilling?
- Elizabeth Barnes: Simeon, say nothing!
- Simeon Barnes: The righteous have no need of cunning. God guards his own in his pocket.