First of all, I'd like to say that it seems to be a mistake to come on a forum for gamers and modders to talk about... balance.
For a gamer, balance means equal opportunities. In chess both players have equal opportunities to win the match. The pieces are exactly the same, the rules are the same, the 'terrain' is the same, only difference is color.
But than again, there is balance in the form of physical equilibrum, like how ppl can maintain their balance while walking on a rope.
Than there is like a 3rd type of balance, the balance in nature. Which actually it refers to harmony. EG "are there enough cats to eat mice, or will the mice be able to reproduce enough that the current amount of cats will not be able to take care of them and thus the mice will overpopulate the cats and rule the restaurant kitchen through sheer numbers".
I think the OP is reffering to harmony, while GamerCreutz is reffering to equal opportunities.