Parker

“But what if I make a mistake?' Will asked.

Gilan threw back his head and laughed. 'A mistake? One mistake? You should be so lucky. You'll make dozens! I made four or five on my first day alone! Of course you'll make mistakes. Just don't make any of them twice. If you do mess things up, don't try to hide it. Don't try to rationalize it. Recognize it and admit it and learn from it. We never stop learning, none of us.”
― John Flanagan, Erak's Ransom

“Master Graves was incensed and said, as punishment for my disruption, I would have to write my letters an extra ten times that day.
"Ten times the better I'll know them, then." I said. "How strange that you should punish me by ensuring I come out more educated than Roden, who has tried to obey you.”
― Jennifer A. Nielsen, The False Prince

“Smart people learn from their mistakes. But the real sharp ones learn from the mistakes of others.”
― Brandon Mull, Fablehaven

“Never did she find anything so difficult as to keep herself from losing her temper when she was suddenly disturbed while absorbed in a book. People who are fond of books know the feeling of irritation which sweeps over them at such a moment. The temptation to be unreasonable and snappish is one not easy to manage.”
― Frances Hodgson Burnett, A Little Princess