The main problem that I have with lying regularly is that in order to lie effectively, you need to somewhat believe your own lies. Eventually, you really do be

The main problem that I have with lying regularly is that in order to lie effectively, you need to somewhat believe your own lies. Eventually, you really do believe the lies you tell and then your ability to see the world for what it is is diminished. Additionally, when dealing with other people, we tend to fill in the blanks about the things we don’t know about them using information we have picked up from other people as a template. We know ourselves better than any other person, so we often use our own motivations as a stand in for the motivations of others. If we are liars ourselves, we assume other people are liars too, by default (and, due to confirmation bias, once we look for evidence of this, we find it everywhere). This mindset means we end up trusting people less than is probably optimal, but we are unaware of this fact.