People should be interested in books, not their authors.

As you yourself have said, what other explanation can there be?' Poirot stared straight ahead of him. 'That is what I ask myself,' he said. 'That is what I never cease to ask myself.

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.

Every man should have aunts. They illustrate the triumph of guess work over logic.

I've always noticed that if you speak the truth in a rather silly way nobody believes you.

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

Nobody knows what another person is thinking. They may imagine they do, but they are nearly always wrong.