“Deep down, even the oldest man in the world refuse to learn from his own mistakes, I thought”

“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 wise man should consider that health is the greatest 
of human blessings, and learn how by his own 
thought to derive benefit from his illnesses.”

“At Yale, when he was young and headstrong, he'd been sure that one day he'd be the very axis of the world, that his life would be one of deep impact. But every young man thought that. A condition of youth, your own importance. The mark you'd make upon the world. But a man learns sooner or later. You take your little nice and you make it your own.”

“A smart person learns from his mistakes, but a truly wise person learns from the mistakes of others.”