It's a poor idea to lie to yourself because you don't gain anything from it. Telling a lie is like fool yourself but more than that is that you fool other people. You build a vicious cycle that you need to keep tabs on, because your story must remain constant and believable at all times.
Some people believe that they would never get caught out with a lie, the truth of the matter is that although you never get caught with the lie other bad things happen around you because of the lie you told. The truth of the matter is that a lie is a quick getaway ticket but at what cost?