A mistake I learn from is not a mistake. I wouldn’t know that anger is a derangement and regret a waste of energy unless I’ve laid with both of them, known them under the covers. There are other ways to learn but none as terrifically good as mistakes.
Men who love themselves do not contradict (from the Latin for speak against) themselves. Self-criticism is truly the grievous error. Many have perished out there, on the hot sands of their own contempt.