The definition of stupidity is a cliche that I didn't hear until I was almost forty years old. This prideful thing is doing the same thing over and over, expecting a different outcome. "By golly, I am going to get what I want and this is the way I am doing it because I thought of it and it will work!"
So, we say our hackneyed scripts, pull out our pocket calculators, ignore--no--disregard history, so that our will be done. Our pride blinds us to the fact that our will will never be done thus. Over and over again, like Sisyphus who thought he was more clever than Zeus. He's the guy that has been pushing a boulder up a hill for the past eternity and then some.