“Especially difficult when the first and best unconscious move of a dedicated liar is to persuade himself he's sincere. And once he's sincere, all deception vanishes.”

“The smile of a deceiver is flawed, insufficient. But can we see these muscles resting there inert when there's so much local variation in faces, pads of fat, odd concavities, differences of bone structure? Especially difficult when the first and best unconscious move of a deliberate liar is to persuade himself he's sincere. And once he's sincere, all deception vanishes.”

“For it will be very difficult to persuade men of sense that he who with dry eyes and satisfaction of mind can deliver his brother to the executioner to be burnt alive, does sincerely and heartily concern himself to save that brother from the flames of hell in the world to come.”

“[T]he great end of education . . . is to persuade and to inspire the sincere love of virtue.”

“When a liar became too skilled at deception, he could lose the ability to discern the truth, and could himself be more easily deceived.”

“It was one of those dangerous moments when speech is at once sincere and deceptive - when feeling, rising high above its average depth, leaves flood-marks which are never reached again.”