The man who makes no mistakes does not usually make anything.

Mistakes are the portals of discovery.

Mistakes are often the best teachers.

There is precious instruction to be got by finding we were wrong.

Wise men learn by other's mistakes, fools by their own.

A mistake is evidence that someone has tried to do something.

The great virtue of a man lies in his ability to correct his mistakes and continually to make a new man of himself.