People make mistake. They never know it was a mistake until others say it is a mistake. Then people make more mistakes and learn from them unmistakably. Although people know there were mistakes here and there, but still they mistakenly do the mistakes over and over again. Sometimes they can’t even define between "I make mistake" and "I am not mistaken".
That is what people always do. And I’m one of them. I do the same, over and over. Did you ever do the same?