Agatha Christie quote about reason from The Mysterious Affair at Styles - You cannot mix up sentiment and reason.
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You cannot mix up sentiment and reason.
 Agatha Christie, The Mysterious Affair at Styles (1920). copy citation

Context

“You see, up to the very last minute, I thought it was Lawrence!»
Poirot grinned.
«I know you did.»
«But John! My old friend John!»
«Every murderer is probably somebody's old friend,» observed Poirot philosophically. «You cannot mix up sentiment and reason.»
«I must say I think you might have given me a hint.»
«Perhaps, mon ami, I did not do so, just because he was your old friend.»
I was rather disconcerted by this, remembering how I had busily passed on to John what I believed to be Poirot's views concerning Bauerstein.” source

Meaning and analysis

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