There are those who must find fault somewhere, among the dead if they cannot find enough among the living. - Sheri S. Tepper

"Show yourselves," cried Stephon. "Only cowards hide in the dark."
"Cowards do many things," said the voice. "Cowards kill their Commanders and make it look like a bandit attack. Cowards plot in secret. Cowards breed insurrection. Cowards plan the abuse of women."

Some can see no farther than their mirrors. What wears another face must go unseen.

You have to notice people to be that sure about them.