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.
There’s more joy in austerity than pleasure in indulgence. Austerity decides wisely, neither anticipates nor regrets, refrains from unnecessary action, keeps the body clean, lean and relaxed, and maintains a bit in the mouth of the mind.