“Nowadays, no one believes in evil. It is considered, at most, a mere negation of good. Evil, people say, is done by those who know no better - who are undeveloped - who are to be pitied rather than blamed. But, M. Poirot, evil is real! It is a fact! I believe in Evil as I believe in Good. It exists! It is powerful! It walks the earth!' He stopped. His breath was coming fast. He wiped his forehead with his handkerchief and looked suddenly apologetic. 'I'm sorry. I got carried away.”

“I stopped believing there was a power of good and a power of evil that were outside us. And I came to believe that good and evil are names for what people do, not for what they are.”

“I believe in our side and theirs, with the good and evil decided after the fact, by those who survive. Among men you seldom find the good with one standard and the shadow with another.”

“Evil exists," he says, not flinching at the word. "I believe that what the rich have done to the poor people in this city is something that a preacher would call evil. Somebody has power. Pretending that they don't so they don't need to use it to help people-that is my idea of evil.”

“Good and Evil are names for what people do, not for what they are...stopped believing there was a power of good and evil. That they were outside of us...People are too complicated for labels.”

“Men who believe in good and evil, and who believe that good should win, should watch for those moments when it is possible to play God”