Of course, the liar often imagines that he does no harm as long as his lies go undetected. But the one lied to almost never shares this view. The moment we consider our dishonesty from the point of view of those we lie to, we recognize that we would feel betrayed if the roles were reversed.

The opportunity to decieve others is ever present and often tempting, and each instance of deception casts us onto some of the steepest ethical terrain we ever cross.

Honesty can force any dysfunction in your life to the surface. Are you in an abusive relationship? A refusal to lie to others – How did you get that bruise? – would oblige you to come to grips with this situation very quickly. Do you have a problem with drugs or alcohol? Lying is the lifeblood of addiction. If we have no recourse to lies, our lives can unravel only so far without others noticing.Telling the truth can also reveal ways in which we want to grow but haven’t.

By wearing cosmetics a woman seeks to look younger or more beautiful than she otherwise would. Honesty doesn't require that she issue a continuous disclaimer: "I see you are looking at my face. Please be aware that I don't look this good first thing in the morning.

Of course, the liar often imagines that he does no harm as long as his lies go undetected.

False encouragement is a kind of theft: it steals time, energy, and motivation a person could put toward some other purpose.

One of the worst things about breaking the law is that it puts one at odds with an indeterminate number of other people. This is among the many corrosive effects of having unjust laws: They tempt peaceful and (otherwise) honest people to lie so as to avoid being punished for behavior that is ethically blameless.

Unlike statements of fact, which require no further work on our part, lies must be continually protected from collisions with reality.