If you acquire a bad habit and you feed it, you will start to become that person. We can come up with justifications for why we did what we did in this case. But the problem is that my rationale is very limited. And I'm really good at persuading myself as a spider said, not to fool yourself. You're the easiest person to fool. That's another reason why rules are so powerful,. relative discretion in theory, given that we're supposedly rational.