When you’re introducing people to tell the truth when they are lying, they will know how simple and easy it can be. Lying can be a good thing, and a bad thing. There are good/reasonable reasons to lie. A good lie is when you’re protecting someone from a bad problem. Lying can cause you harm sooner or later in your life. Lying is sometimes allowable, when you're protecting someone's feelings, or when you’re protecting something, or someone with a reasonable reason.
When people lie they have to know that it will be harder on them, but when you tell the truth it will be easier. “A lie, even if it does not wrong any particular individual, always harms mankind individually, for it vitiates the source of law.” (Bok, 1999) Lying