Samantha: Darrin, don't make mother angry. She's very difficult when she gets angry.
Darrin: Since when does she have to be angry to be difficult?
Endora: Your right, Derweed. I don't have to be angry to be difficult. [pause] But it helps.
Samantha: Oh, Darrin. When are you going to learn that mother knows best. And what mother knows best - is how to be difficult.