Satistifaction

What does it mean to be satisfied?  I certainly don't know.  Yet I know many people who seem to know.  They tell me that they are happy.  They tell me that they are successful.  They tell me that their love life is really good.  I, of course, wonder.  Satisfaction is transient.  It is evasive.  How is it that they capture this essence ?  For sure, how do they seemingly, with their answers, capture satisfaction or happiness forever.  They are Liars.