Wherever there is human nature, there is drama. - Agatha Christie

For in the long run, either through a lie, or through truth, people were bound to give themselves away …

But how much are the delicate convolutions of the brain influenced by the digestive apparatus? When the mal de mere seizes me I, Hercule Poirot, am a creature with no grey cells, no order, no method — a mere member of the human race somewhere below average intelligence!

Even the sensible and the competent have been given tongues by le bon Dieu — and they do not always employ their tongues wisely.