"a wise man learns from others mistakes while a fool learns from his own.?
552483
Proverbs 17:10\n\n"A rebuke impresses a man of discernment more than a hundred lashes a fool."\n\n\nI know its' not exactly what you're looking for, but that's as close as I could find.
530487
The original quote was actually "Those who do not learn from the mistakes of history are doomed to repeat them." The statement was made by George Santayana, philosopher, from Reason in Common Sense. \n\nThe quote has been tweaked a bit throughout history, perhaps to give a more modern and personal connection to the quote.
765535
He whom doesn't trust others... doesn't trust himself in the first place....
259032
It appears to be an English or Danish proverb, source unknown:\n\n"You can judge a man by the company he keeps."
586342
"Those who fail to learn the lessons of history are doomed to repeat them."---George Santayana \n\nIt's not quite the quote you gave, but it's close.
549323
From the way the question is worded, I would have to say that person A seems to be the better person since he has learned will power.  This isn't something easily done.  It at least shows that he's intelligent.  Person B sounds like Forrest Gump.\n\nIf you're asking which person has the higher moral value...well, you'll never know which of the two is better in that context until person B has an evil thought.  It is then, and only then, will you know if person B has the will power not to act on his evil thought.  However, if your hypothetical person B can never get an evil thought, then person B is the better one since he's all good.
798976
FOR WESMEISTER:  Answer not a fool according to his folly lest thou also be like unto him.\n                                                 Proverbs 26:4
287688
Someone who's an idiot
671961
ONLY LEARNED PEOPLE CAN BE JEALOUS OF ANOTHER LEARNED PERSON \nOTHERWISE WHO ELSE CAN BE. BUT IT MUST BE A POSITIVE ONE FOR ONE TO DO BETTER TRY BETTER AND NOTHING MORE THAN THAT.\nFROWN MAY NOT BE THE CORRECT WORD.
524699
Some Fools Never Learn
1144626
Wise people...everyone makes mistakes.   As long as you learn from them, and don't make them again, it's ok!
557454
Aha! but there is another wise saying: "he who asks a question may be a fool for five minutes, but he who does not ask remains a fool forever".  Surely this is the whole philosophy behind Yahoo Answers!
295581
Most people aren't stupid. Do you think they are stupid because they have different opinions and viewpoints from you? \n\nMark Twain said something like...When I was young, I thought my father was stupid. I'm amazed at how much the old man learned in the last few years.\n\nPerhaps as you age you will have more respect for your fellow man and realize that perhaps you weren't as wise in your initial judgment as you thought.
452702
I make mistakes big ones small ones good ones and bad ones. I learn from my mistakes and I grow from them. I gain knowledge and wisdom from them. All those mistakes I've made, make up who I am today. It seems like you get 5 or 6 split second decisions that change the course of your life forever.
744200
The wise man would be Karl Marx.
946156
Good Judgement comes from Experience, Experience comes from Bad Judgement.
509027
given the chance to fix one thing in my life, it would be ALL the wrongdoings i have made. but then, if i have been perfect all my life, what's the use of living this life and learning from our own mistakes? those mistakes in the past contributed to the person that we are now. things happen for a reason regardless if it is intentional or not. the best thing to do is to learn from one's mistake and continue living for the better, not for the worst.