We can think Balance in life is very complex subject to look at and understand, difficult to have in practical situations, there is soo much +1, 0, -1 how would i know if my action is +1 or -1? when there are so many grey areas to nit pick and all.... or not. It can also be very simple and easy to understand, depends on your perspective and understanding.
Let us look at simple balance old fashioned one used to weigh in shops or the one you can see the Lady Justice holding in her hand in some old courts if you have them these days. There is a balancing arm held in center with two bowls hanging with threads or chains. what does it represent? we only know that when there is equal weight on both sides the bowls are at same level, then it is called balance. but million dollar question is what is being weighed here?
is it Positive Vs Negative, Good Vs Bad or God Vs Satan? none of these.
The balance has on one side the issues, situations, fears and past that you face, and other side is your capabilities, wisdom, courage and virtues. When your abilities on one side are able to weigh down the problems you face, then you are careless and lazy, wont grow. When problems weigh down your abilities and you are not able to cope then you are under stress, depression or breakdown.
Balance is in between when you are able to face the challenges by developing yourself all the time and increasing the weight of your capabilities. In Life we never achieve a perfect balance because it would mean stagnation we always want the balance swinging slightly with in a range, this will cause growth and satisfaction, fun and hard work.
It was never about good or bad, positive or negative. Balance is about how much you can tolerate and grow. How good you are a judge of your capabilities. If we are lacking some where we got to learn and earn to cope up to bring back the balance in tolerable zone. When one is not able to keep it swinging in the right zone but one side goes down and other side is lighter, then the person is said to have lost balance. In short either too depressed or too lazy and careless.
where does Good Vs Evil come into play then?
Obviously in movies and gossip. LOL..... or may be in philosophy and myth. It exciting to have a dramatic story of a hero a role model with all the super human capabilities or Demi God to idolize. We can take inspiration from them, nothing wrong with that.
Point is when you have good balance in life, you become Good, you know the right way and do the right thing. When one is unable to maintain the balance then one is forced to be a hypocrite and does wrong things due to ignorance, commits crime and even silly mistakes which people regret.
Its a simple perspective of life. Accept life, know what you are and improve that is balance. Nothing else.