Fable 51 - The Braggart

A man who practiced the pentathlon, but who his fellow-citizens continually reproached for his unmanliness, went off one day to
foreign parts. After some time he returned, and he went around boasting of having accomplished many extraordinary feats in various
countries, but above all of having made such a jump when he was in Rhodes that not even an athlete crowned at the Olympic Games could
possibly equal it. And he added that he would produce as witnesses of his exploit people who had actually seen it, if ever they came to his country.
Then one of the bystanders spoke out:
‘But if this is true, my friend, you have no need of witnesses. For here in Rhodes right here - make the jump.’

This fable shows that as long as one can prove something by doing, talk is superfluous.