I've just remember that I loved this conversation between father Brown and the prince Saradine:
"Do you believe in doom?" asked the restless Prince Saradine suddenly.
"No," answered his guest. "I believe in Doomsday."
The prince turned from the window and stared at him in a singular manner, his face in shadow against the sunset.
"What do you mean?" he asked.
"I mean that we here are on the wrong side of the tapestry," answered Father Brown. "The things that happen here do not seem to mean anything; they mean something somewhere else. Somewhere else retribution will come on the real offender. Here it often seems to fall on the wrong person."