A woman who doesn't lie is a woman without imagination and without sympathy.

Be sure thy sin will find thee out.

Money ... is always the great clue to what is happening in the world.

Who are you? You don't belong to the police?' 'I am better than the police,' said Poirot. He said it without conscious arrogance. It was, to him, a simple statement of fact.

too much safety is abhorrent to the nature of a human being.

Sometimes I feel sure he is as mad as a hatter and then, just as he is at his maddest, I find there is a method in his madness.

I would like it to be said that I was a good writer of detective and thriller stories.