“When goodness removes itself, the space it occupies corrodes and becomes evil, and maybe splits apart and multiplies.”

“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.”

“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.”

“She wasn't afraid of doing good or of resisting evil. She was merely afraid she might not be able to tell the difference.”

“People who claim that they're evil are usually no worse than the rest of us... It's people who claim that they're good, or any way better than the rest of us, that you have to be wary of.”