“The real thing about evil… you figure out one side of it - the human side, say - and the eternal side goes into shadow. Or vice versa. The real disaster of this inquiry is that it is the nature of evil to be secret.”

“The real thing about evil," said the Witch at the doorway, "isn't any of what you said. You figure out one side of it - the human side, say - and the eternal side goes into shadow. Or vice versa. It's like the old saw: What does a dragon in its shell look like? Well no one can ever tell, for as soon as you break the shell to see, the dragon is no longer in its shell. The real disaster of this inquiry is that it is the nature of evil to be secret.”

“The nature of the world is to be calm, and enhance and support life, and evil is an absence of the inclination of matter to be at peace.”

“[after discussion about what evil is, a question asked to Elphaba on why she killed Madame Morrible]"Why did you do it?" asked the hostess with spirit.The Witch shrugged. "For fun? Maybe evil is an art form.”

“And girls need cold anger. They need the cold simmer, the ceaseless grudge, the talent to avoid forgiveness, the side stepping of compromise. They need to know when they say something that they will never back down, ever, ever.”

“Some said the original evil was the vacuum caused by the Fairy Queen Lurline leaving us alone here. When goodness removes itself, the space it occupies corrodes and becomes evil and maybe slpits apart and multiplies. So every evil thing is a sign of the absence of deity”

“It isn't hard to find evil in this world. Evil is always more easily imagined than good, somehow.”