- Augustus Aylmer: [to Father Brown] You probably don't realize the desperate things a man will do when the doctors... tell him he's dying.
- Augustus Aylmer: Now, I sometimes wonder whether lies and truth aren't just... two faces of the same reality. Is that possible do you think?
- Father Brown: No, no, I don't.
- Augustus Aylmer: But you must.
- Father Brown: Truth comes from God, Mr. Aylmer; lies from the Devil.
- Augustus Aylmer: Aye, but they're... just two sides of the same reality.
- Father Brown: Yes, well, now we know that John Strake is not going to get your money. We must see to it, musn't we, that he doesn't get your soul.
- John Strake: The murderer came and went without leaving any trace.
- Father Brown: Oh, but that's impossible.
- John Strake: So are miracle, Father Brown. If God can perform them, the Devil can too.