“You talking about computer weaknesses?""Yes. But also human weaknesses.""Meaning what?""Meaning the types of weaknesses that make humans let down their guard. Trust people they shouldn't trust.""You're talking about manipulating people.""Yes." Dexter and Lester were staring at each other. "I guess I am.”

“Management is about human beings. Its task is to make people capable of joint performance, to make their strengths effective and their weaknesses irrelevant.”

“You went from worrying about being weak to wanting a fence with me?""I don't give a flying fuck about being weak. You're the only thing I care about. You make me whole. You make me feel. You make me..." He searched for the word. "Everything." He pulled her tighter to him. "It's always been you, Holly. And it always will be. Say yes.""Yes," she said instantly. "To everything.”

“I not only have my secrets, I am my secrets. And you are yours. Our secrets are human secrets, and our trusting each other enough to share them with each other has much to do with the secret of what it means to be human.”

“I only want to remind you what weak creatures human beings are. Even people who seem to have wills of steel have serious weaknesses! At those moments of weakness, will power breaks into a thousand pieces.”

“Trains are relentless things, aren't they, Monsieur Poirot? People are murdered and die, but they go on just the same. I am talking nonsense, but you know what I mean.""Yes, yes, I know. Life is like a train, Mademoiselle. It goes on. And it is a good thing that that is so.""Why?""Because the train gets to its journey's end at last, and there is a proverb about that in your language, Mademoiselle.""'Journey's end in lovers meeting.'" Lenox laughed. "That is not going to be true for me.""Yes--yes, it is true. You are young, younger than you yourself know. Trust the train, Mademoiselle, for it is le bon Dieu who drives it."The whistle of the engine came again."Trust the train, Mademoiselle," murmured Poirot again. "And trust Hercule Poirot. He knows.”