Deceit

 

 A liar is intent to deceive others, but he is aware of that intention and he does not hide it from himself. On the contrary, he can always decide to resort to a "secondary behavior" outside of the original context (or even change the story and "turn the page" altogether). His public assurances ("I'd never want to deceive you! This is true. I swear it!") entail an "inner negation", but the liar ascribes it not to himself but to the character he is playing before the "consumer" of his lie. This character is not him, for he knows well the truth and this lie does not put into the play the inner structure of his consciousness

JEAN PAUL SARTRE