The context of our passage speaks of judgment against Jerusalem and Judah. In this judgment the Lord vowed to remove much of the strength of the land. He promised to remove the mighty man and the man of war, the judge and the prophet, the honourable man and the counseller. The removal of these people would certainly weaken any city, town, or nation. Yet, it is in the midst of this list that the Lord included the prudent. Apparently, the prudent are the strength of any people just as much as their great warriors and judges. When all things are considered, this makes perfect sense. Those who are prudent make decisions that stabilize any people and provide future stability as well.