“Humans are pathetically greedy and easy to manipulate.”
“Decent people are so easy to manipulate, Potter.”
“Dismiss perfection as an ache of the greedy, but do not give in to the mass modesty of easy imperfection.”
“...this was depressing, much the way discovering that somebody is easy to manipulate is always a little depressing.”
“It's easy to manipulate your children when they're absolutely sure you're stupid.”
“When it comes to controlling human beings there is no better instrument than lies. Because, you see, humans live by beliefs. And beliefs can be manipulated. The power to manipulate beliefs is the only thing that counts.”