“Evil is an act, not an appetite. How many haven't wanted to slash the throat of some boor across the dining room table? Present company excepted of course. Everyone has the appetite. If you give in to it, it, that act is evil. The appetite is normal.”

“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.”

“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.”

“It's hard to find evil in this world,' said the Witch. Evil is always more easily imagined than good, somehow.”

“[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.”

“We are loping sequences of chemical conversions, acting ourselves converted. We are twists of genes acting ourselves twisted; we are wicks of burning neuroses acting ourselves wicked. And nothing to be done about it. And nothing to be done about it.”