"I say unto you, that likewise joy shall be in heaven over one sinner that repenteth, more than over ninety and nine just persons, which need no repentance."
If people don't repent then they are not ressurected in Heaven and so are not joyous- therefore the 'more than' would go without saying...however, I assume it does not mean this.
If it's talking about truly 'just' people with no sin (and its not being ironic) then, erm, they don't exist. Does it mean angels? Does it mean we are happier for having sinned but repented and, thereby, better off than Adam and Eve pre-sin?! Help!