Where there is no counsel, the people fall; but in the multitude of counselors there is safety.
Listen to the "Verse by Verse" episode covering this scripture.
No one can foresee every opportunity or every pitfall in life. This is especially true of the leader of a nation. Solomon stresses the importance of seeking counsel from a multitude of wise counselors in making important decisions that affect a nation.
It is also good advice for individuals when facing important decisions that will affect their lives and the lives of their families.