I have also seen this example of wisdom under the sun, and it seemed great to me.
There was a little city with few people in it. A great king came against it and besieged it, building great siegeworks against it.
Now there was found in it a poor wise man, and he by his wisdom delivered the city. Yet no one remembered that poor man.
So I said, "Wisdom is better than might; yet the poor man's wisdom is despised, and his words are not heeded."