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.

It is odd how, when you have a secret belief of your own which you do not wish to acknowledge, the voicing of it by someone else will rouse you to a fury of denial.

There is nothing so dangerous for anyone who has something to hide as conversation!... A human being, Hastings, cannot resist theopportunity to reveal himself and express his personality which conversation gives him. Every time he will give himself away.

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

One never quite allows for the moron in our midst.

Everybody always knows something," said Adam, "even if it's something they don't know they know.

To count - really and truly to count - a woman must have goodness or brains.