"I also saw under the sun this example of wisdom that greatly impressed me: There was once a small city with only a few people in it. And a powerful king came against it, surrounded it and built huge siegeworks against it. Now there lived in that city a man poor but wise, and he saved the city by his wisdom. But nobody remembered that poor man. So I said, 'Wisdom is better than strength.' But the poor man's wisdom is despised, and his words are no longer heeded." NIV translation
Solomon tells a parable that compares wisdom and strength. In this we see a picture of the remnant of God's people and the role of a prophet. Many times the prophet was ignored or down-right despised as he shared a message from God. Most of the time, God used poor men to deliver the message that had the power to save the people.
"The quiet words of the wise are more to be heeded than the shouts of a ruler of fools. Wisdom is better than weapons of war, but one sinner destroys much good." NIV translation
Have you ever noticed that fools are usually the loudest and proudest of speakers? They will speak as though volume and quantity of words make up for their lack of wisdom. A wise man or woman will build up others while a fool/sinner will destroy.