I think we are all "liars" at some point, usually without malicious intent. "How are you?" "Oh, fine, thank you..." How often do we lie with that answer? And how often is our counterpart interested in a really honest answer...? This lying is, how shall I say, reflexive, in order to avoid profundity. An "I don't have time" is perhaps also a lie and actually means "I don't feel like it".... So what? My problem starts when one deceives others and oneself, when one systematically lies.