Very true, but the other old saying is, "Fool me once, shame on your stupidity. "Fool me twice, maybe I'm the one being stupid by believing you are acting in

Very true, but the other old saying is, "Fool me once, shame on your stupidity. "Fool me twice, maybe I'm the one being stupid by believing you are acting in good faith, and attributing to stupidity, that which was actually caused by malice."