There are some people who don't conform to the signals. An ordinary well-regulated locomotive slows down or pulls up when it sees the red light hoisted against it. Perhaps I was born color blind. When I see the red signal -- I can't help forging ahead. And in the end, you know, that spells disaster.

I'm afraid of death... Yes, but that doesn't stop death coming.

The past is the father of the present.

In old days the public didn't really mind much about accuracy, but nowadays readers take it upon themselves to write to authors on every possible occasion, pointing out flaws.

I don't think necessity is the mother of invention. Invention, in my opinion, arises directly from idleness, possibly also from laziness - to save oneself trouble.

That was what, ultimately, war did to you. It was not the physical dangers--the mines at sea, the bombs from the air, the crisp ping of a rifle bullet as you drove over a desert track. No, it was the spiritual danger of learning how much easier life was if you ceased to think.

You've a pretty good nerve," said Ratchett. "Will twenty thousand dollars tempt you?" It will not." If you're holding out for more, you won't get it. I know what a thing's worth to me." I, also M. Ratchett." What's wrong with my proposition?" Poirot rose. "If you will forgive me for being personal - I do not like your face, M. Ratchett," he said.