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 the quietest and meekest people who are often capable of the most sudden and unexpected violences for the reason that when their control does snap, it goes entirely. (Hercule Poirot)

To win a war is as disasterous as to lose one.

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.

Our weapon is our knowledge. But remember, it may be a knowledge we may not know that we possess.

Don't think. That is the wrong way to bring anything back. Let it go. Sooner or later it will flash into your mind.

There hung about her the restrained energy of a whiplash.