I know nothing about pistols and revolvers, which is why I usually kill off my characters with a blunt instrument or better with poisons. Besides, poisons are neat and clean and really exciting... I do not think I could look a really ghastly mangled body in the face. It is the means that I am interested in. I do not usually describe the end, which is often a corpse.

Evil is not any superhuman, but it is HUMAN.

I have often had occasion to notice how, where a direct question would fail to elicit a response, a false assumption brings instant information in the form of a contradiction.

I do not argue with obstinate men. I act in spite of them.

I'm not often bored,' I assured her. "Life's not long enough for that.

Poirot," I said. "I have been thinking." "An admirable exercise my friend. Continue it.

Too much mercy... often resulted in further crimes which were fatal to innocent victims who need not have been victims if justice had been put first and mercy second.