I prefer the English translation, it's more direct, though it does lack the bit about avoiding your own mistakes.
A more literal translation for those that don't speak German:
Those that attempt to learn from their mistakes are idiots. I always try to learn from the mistakes of others and avoid making any myself.
Note: I'm not a German speaker, what I know of the language is from three years of high school classes taken over a decade ago, but I think this translation is more or less correct.
It's not exactly the quote.
Bismark doesn't speak about people who attempt to learn but who believe they learn.
Another month, another rationality quotes thread. The rules are: