mistakes show us what we still need to learn.why we say that?there are so many instances.
for example,Thomas Alva Edison invented an electric light,he had failed once and once.but he never gave up,he said 'although I failed but I found thousands of materials can't to be done light.'The end he was successful.
The things still has more and more.In these difficult or same things we know that mistakes show us what we still need to learn.
thank you very much.