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.

Wise Men learn by other's harms; Fools by their own.

Nur ein Idiot glaubt, aus eigenen Erfahrungen zu lernen. Ich ziehe es vor, aus den Erfahrungen anderer zu lernen, um von vorneherein eigene Fehler zu vermeiden.

No man is so foolish but he may sometimes give another good counsel, and no man so wise that he may not easily err if he takes no other counsel than his own. He that is taught only by himself has a fool for a master.

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.

A wise man can learn more from a foolish question than a fool can learn from a wise answer.

Even a fool learns something once it hits him.

The only real difference between a wise man and a fool, Moore knew, was that the wise man tended to make more serious mistakes — and only because no one trusted a fool with really crucial decisions; only the wise had the opportunity to lose battles, or nations.

The wise man molds himself — the fool lives only to die.

the only difference between a wise man and a fool was in the magnitude of his mistakes. To err was human, and the smarter and more powerful you were, the greater the scope of your screwup.

A fool sees himself as another, but a wise man sees others as himself.

He that is taught only by himself has a fool for a master.

But no matter how much parents and grandparents may have sinned against the child, the man who is really adult will accept these sins as his own condition which has to be reckoned with. Only a fool is interested in other people's guilt, since he cannot alter it. The wise man learns only from his own guilt. He will ask himself: Who am I that all this should happen to me? To find the answer to this fateful question he will look into his own heart.

Fools learn from experience. I prefer to learn from the experience of others.