Balance to the force.
If GL meant for balance to be good, and imbalance to be evil, like I have heard, then why are their still "dark jedi" or "sith" like dasaan after the fall of the empire, unless:
Balance is the balance between good and evil so that good wont corrupt itself and make evil and so that evil wont betray itself and make good, and there is a constant battle?
but this is not what george lucas meant so:
the question remains, if luke brought balance to the force, how come there are still sith after him and during his rise to power as NJO luke.
to list a few of these sith:
Dasaan
The spirit of Palpatine
The spirit of Exar Kun
the spirit of a number of ancient sith
so there you have it... could I have an answer?