'You've said that several times,' said Wain, with a puzzled air; 'but I can't see any inference, except that this murderer threw an arrow and hit a man on the top of a house very like a fortress. But of course the arrow wasn't thrown but shot, and would go much further. Certainly it went uncommonly far; but I don't see how it brings us any farther.'
'I'm afraid you missed the point of the story,' said Father Brown. 'It isn't that if one thing can go far another can go farther. It is that the wrong use of a tool can cut both ways. The men on Crake's fort thought of a knife as a thing for a hand-to-hand fight and forgot that it could be a missile like a javelin. Some other people I know thought of a thing as a missile like a javelin and forgot that, after all, it could be used hand-to-hand
