Virtue," he said. "The real thing. It's not some kind of cuddly teddy bear you can keep on the shelf until you need a hug. It's dangerous, which is why it makes people so nervous. Virtue has its own agenda, and believe me, it's not always yours. The word itself means strength, power. And when it gets loose, you'd better watch out."
Something bad might happen..."
Impossible. But possibly something painful"
-A Wizard Alone by Diane Duane

Author: Diane Duane