“Only a fool learns from his own mistakes. The wise man learns from the mistakes of others.”
“Wise is the one who learns from another´s mistakes. Less wise is the one who learns only from his own mistakes. The fool keeps making the same mistakes again and again and never learns from them.”
“A smart person learns from his mistakes, but a truly wise person learns from the mistakes of others.”
“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.”
“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.”
“Smart people learn from their mistakes. But the real sharp ones learn from the mistakes of others.”