Mischief moves somewhere near and I must blast it with my magic! - Jack Vance

Ignorance induces suspicion.

Shanne said, “You are quiet; are you sad?”
“In a way. Do you know why?”
She put her hand across his mouth. “Never speak of it. What must be, will be. What can never be—can never be.”
Ghyl turned to look at her, trying to divine every last scintilla of her meaning.
“But,” she added in a soft voice, “what can be—can be.”

Human interactions, stimulated as they are by disequilibrium, never achieve balance. In even the most favorable transaction, one party—whether he realizes it or not—must always come out the worse.