The wise ruler looks at all sides of a situation.  Otherwise, he cannot obtain what is authentic.

The wise ruler listens, but makes speakers responsible for what they say.  Thus he can ascertain needed information, but does not allow ministers to neglect their abilities.  

The wise ruler investigates into matters by maneuvering information.  Thus he can use the known to find out the unknown.

The wise ruler maneuvers statements and matters.  This allows him to make observations and find out wrongdoings.

       If the ruler takes advice only from high-ranking ministers, never listens to a variety of sources, and only has one exclusive source of information, then ruin is possible.

      The wise ruler, in regards to people and gossip, observes and verifies who is skilled at what and who is lacking at what, and he does not allow ministers to spread gossip and rumors.

      If the ruler is foolish and easily swayed, if he has no discretion and lets every secret out, if he tells every minister what the others said, then ruin is possible.