“Mistakes are a part of being human. Precious life lessons that can only be learned the hard way. Unless it's a fatal mistake, which, at least, others can learn from.”
“One should learn the lessons of history. The mistakes of the past need only be made once. Unless there are no other choices. ~ Bayaz”
“The best lessons learned are from other peoples mistakes.”
“The only mistake we can make is not learning from our mistake.”
“As you go through life, you learn many lessons. Unfortunately these lessons only apply to the specific instances in which you learned them. Therefore you can expect to make horrible mistakes no matter how long you live.”
“Only a fool learns from his own mistakes. The wise man learns from the mistakes of others.”