Taking up tsuwm's implied challenge, a bit of Googling on 'medan agan' shows this expression, like 'gnothi seaton', to be an inscription on the walls of the Temple of Apollo at Delphi (and probably other places). If I have understood correctly, although it is commonly taken to mean 'nothing in excess' it is probably closer to 'moderation in all things', or 'follow the median path', recognising the human (or Dionysian) need for celebration of all there is to enjoy but calling for balance, not obsession.

How'd I do?