“I did not deceive you, mon ami. At most, I permitted you to deceive yourself.”

“Mon ami, let this be a lesson to you. You are a man. Behave, then, like a man! It is against Nature for a man to grovel. Women and Nature have almost exactly the same reactions! Remember it is better to take the largest plate within reach and fling it at a woman's head than it is to wriggle like a worm whenever she looks at you!”

“Ah, but life is like that! It does not permit you to arrange and order it as you will. It will not permit you to escape emotion, to live by the intellect and by reason! You cannot say, 'I will feel so much and no more.' Life, Mr. Welman, whatever else it is, is not reasonable. [Hercule Poirot]”

“He dragged me back - just in time. A tree had crashed down on to the side walk, just missing us. Poirot stared at it, pale and upset. "It was a near thing that! But clumsy, all the same - for I had no suspicion - at least hardly any suspicion. Yes, but for my quick eyes, the eyes of a cat, Hercule Poirot might now be crushed out of existence - a terrible calamity for the world. And you, too, mon ami - though that would not be such a national catastrophe." "Thank you," I said coldly.”

“I suppose next time I come home I shall find you wearing false moustaches—or are you doing so now?' Poirot winced. His moustaches had always been his sensitive point. He was inordinately proud of them. My words touched him on the raw. 'No, no, indeed, mon ami. That day, I pray the good God, is still far off. The false moustaches! Quelle Horreur!’ He tugged at them vigorously to assure me of their genuine character. 'Well, they are very luxuriant still,' I said. 'N’est-ce pas? Never, in the whole of London, have I seen a pair of moustaches to equal mine.' A good job too, I thought privately.”

“Mon cher docteur! Do you not think I know the female mentality? The village gossip, it is based always, always on the relations of the sexes. If a man poisons his wife in order to travel to the North Pole or to enjoy the peace of a bachelor existence—it would not interest his fellow-villagers for a minute!”

“But I know human nature, my friend, and I tell you that, suddenly confronted with the possibility of being tried for murder, the most innocent person will lose his head and do the most absurd things.”