I get Real Simple's Daily Thought in my email every morning. This morning's thought was:
"The more hidden the venom, the more dangerous it is." ~ Marguerite De Valois
It made me think of villains. Some who come specifically to mind... Marquise de Merteuil in Dangerous Liaisons, Cousin Bette in the book of the same name by Balzac, and even Caroline Bingley in Pride & Prejudice (in her treatment of Jane) is a creature with hidden venom.
Villains who appear honorable on the surface are far more frightening than villains who are unquestionably evil (like Voldemort!)
Which do you prefer? The outright evil villain or the inner venomous one? Which one frightens you more? Which is easier to hate?