The third influence is what you believe about yourself. If you believe in getting what you want dishonestly, you will probably become a very dishonest person, an accomplished and professional liar, and a thief. But you will probably do that at the expense of having good relationships with people. Sooner or later they will know you for what you are, or you will have to move on to prevent your dishonest activities from catching up with you. But most people don't think of themselves as dishonest.
Most people think of themselves as honest, but draw the line.
Where that line is drawn depends on how strongly they want to hide something. The problem with having lines that can easily be moved is that what we really are is a a high priced con man. If you really believe you want to be honest, you may have to make sacrifices to stay that way. Chances are your own self esteem will erode as the disparity between what you fool yourself into believing and the real you becomes more apparent because of your frequent lies. Again, the liar gets hurt by the lies.