“The secret of rulership is to combine a belief in one’s own infallibility with a power to learn from past mistakes.”

“You must learn from your past mistakes, but not lean on your past successes.”

“Some of the best lessons we ever learn are learned from past mistakes. The error of the past is the wisdom and success of the future.”

“Like most of those who study history, he learned from the mistakes of the past how to make new ones.”

“Smart people learn from their mistakes. But the real sharp ones learn from the mistakes of others.”

“That is probably the hardest thing a person can learn, as I so often find in others (and in myself as well in the past) to forgive one’s own mistakes and lapses.”

“To make no mistakes is not in the power of man; but from their errors and mistakes the wise and good learn wisdom for the future.”

“Human beings learn from their errors and error during a process can have educational effect, but why the humans make the mistakes? Because the process of education is the one of learning from errors. It means that the ones make the mistakes and this gives them the power of motivational ability.”

“It's said that a wise person learns from his mistakes. A wiser one learns from others' mistakes. But the wisest person of all learns from others's successes.”

“We learn a lot from the mistakes of others, but even more from our own.”