“I am not one to rely upon the expert procedure. It is the psychology I seek, not the fingerprint or the cigarette ash.”

“It is the brain, the little gray cells on which one must rely. One must seek the truth within--not without." ~ Poirot”

“I am not mad. I am eccentric perhaps--at least certain people say so; but as regards my profession. I am very much as one says, 'all there.”

“Poirot said placidly, “One does not, you know, employ merely the muscles. I do not need to bend and measure the footprints and pick up the cigarette ends and examine the bent blades of grass. It is enough for me to sit back in my chair and think. It is this – ” he tapped his egg-shaped head – “this, that functions!”

“Mrs. Cavendish: I am charming to my friends one day, and forget all about them the next.”

“That is what I mean. A bath! The receptacle of porcelain, one turns the taps and fills it, one gets in, one gets out and ghoosh - ghoosh - ghoosh, the water goes down the waste pipe!""M. Poirot are you quite mad?""No, I am extremely sane.”

“I believe the present matters --- not the past! The past must go. If we seek to keep the past alive, we end, I think, by distorting it. We see it in exaggerated terms --- a false perspective.”