Inscribed on the ancient Temple of Apollo at Delphi were the Delphic Maxims.  
     Although not divine commandments, they were wise, short, to-the-point sayings guiding people to a good, virtuous life.            

They are either attributed to the Oracle of Delphi or to The Seven Sages or "wise men" of Greece (620-550 BCE).  Over years, through public and political upheaval and pressure, more sayings were added, however, only those relevant and not contrary to the tenants of Rational Hedonism are observed.
    The Delphic Maxims (partially listed below) serve as the groundwork and Foundation of Rational Hedonism, taught to our children and studied by adults.  
     Without these preliminary understandings as a strong foundational, centering base, the Beliefs (or Columns) of Rational Hedonism may collapse on someone who uses them as justification (or excuse) for self-destructive behavior such as being obnoxious or a narcissist.    
     It is unfortunate that so many people hear the word, "hedonism" and not the "Rational" which comes before it. Rational Hedonism is centered on living a life of pleasure, happiness and no regret. The ability to live with "no regrets" comes from living a good life.