“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.”
“Only a fool learns from his own mistakes. The wise man learns from the mistakes of others.”
“Smart people learn from their mistakes. But the real sharp ones learn 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.”
“The quickest way to rectify that mistake (choosing the wrong person) is by learning from that, moving on, and choosing much more wisely in the future.”