In My End Is My Beginning -

I've A Theory That One Can Always Get Anything One Wants If One Will Pay The Price. And Do You Know What The Price Is, Nine Times Out Of Ten? Compromise.

... Obsessions Are Always Dangerous.

Vous Eprouves Trop D'emotion, Hastings, It Affects Your Hands And Your Wits. Is That A Way To Fold A Coat? And Regard What You Have Done To My Pyjamas. If The Hairwash Breaks What Will Befall Them?' 'good Heavens, Poirot,' I Cried, 'this Is A Matter Of Life And Death. What Does It Matter What Happens To Our Clothes?' 'you Have No Sense Of Proportion Hastings. We Cannot Catch A Train Earlier Than The Time That It Leaves, And To Ruin One's Clothes Will Not Be The Least Helpful In Preventing A Murder.

The Science Of Tomorrow Is The Supernatural Of Today.

Imagination Is A Good Servant, And A Bad Master.