If the chain of causation can be broken for a madman, it can be broken for a man.
 G. K. Chesterton, Orthodoxy (1908). copy citation

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Author G. K. Chesterton
Source Orthodoxy
Topic chains
Date 1908
Language English
Reference
Note
Weblink http://www.gutenberg.org/cache/epub/130/pg130-images.html

Context

“R.B.Suthers said that free will was lunacy, because it meant causeless actions, and the actions of a lunatic would be causeless. I do not dwell here upon the disastrous lapse in determinist logic. Obviously if any actions, even a lunatic's, can be causeless, determinism is done for. If the chain of causation can be broken for a madman, it can be broken for a man. But my purpose is to point out something more practical. It was natural, perhaps, that a modern Marxian Socialist should not know anything about free will. But it was certainly remarkable that a modern Marxian Socialist should not know anything about lunatics.” source