“You tell your lies and you think nobody knows. But there are two people who know. Yes- two people. One is le bon Dieu - and the other is Hercule Poirot”

“Trains are relentless things, aren't they, Monsieur Poirot? People are murdered and die, but they go on just the same. I am talking nonsense, but you know what I mean.""Yes, yes, I know. Life is like a train, Mademoiselle. It goes on. And it is a good thing that that is so.""Why?""Because the train gets to its journey's end at last, and there is a proverb about that in your language, Mademoiselle.""'Journey's end in lovers meeting.'" Lenox laughed. "That is not going to be true for me.""Yes--yes, it is true. You are young, younger than you yourself know. Trust the train, Mademoiselle, for it is le bon Dieu who drives it."The whistle of the engine came again."Trust the train, Mademoiselle," murmured Poirot again. "And trust Hercule Poirot. He knows.”

“If you are to be Hercule Poirot, you must think of everything.”

“It takes two people to make a lie work: the person who tells it, and the one who believes it.”

“No one can know you better than two peoples in the world.1- Yourself2- Your Mirror”

“When you're eleven you think every idea is born with you, that no one ever tried it the right way before. Your example, your own honesty, will make you a hero to everyone who knows you - and better, it will make people come to their senses and stop telling vicious lies about each other.”