Among other common lies, we have the silent lie - the deception which one conveys by simply keeping still and concealing the truth. Many obstinate truth-mongers indulge in this dissipation, imagining that if they speak no lie, they lie not at all.
Mark TwainThe moral sense enables one to perceive morality, and avoid it. The immoral sense enables one to perceive immorality and enjoy it.
Mark Twain