“A liar will not be believed even when he speaks the truth.”
“No one believes a liar even when he tells the truth”
“No one believes a liar. Even when she's telling the truth.”
“I don't believe in speaking ill of the dead, even when it's the truth.”
“Just because something isn't a lie does not mean that it isn't deceptive. A liar knows that he is a liar, but one who speaks mere portions of truth in order to deceive is a craftsman of destruction.”
“A man is never more truthful than when he acknowledges himself a liar.”