Rather than seeing this with trading "weight scale" model, good on the left side and bad on the right side, some good can be 'discounted' during special events and same on the bad can be deducted with special voucher code. Which was the model originally described in the egyptian book of the dead, picture below:

I see the more appropriate model to see this is more towards:
Anything that one think, feel and do shall be reflected back towards it's own soul.The hate you sent out will be reflected back.
The love you sent out will be reflected back, and the love will cleanse the hate.
The anger you sent out will be reflected back.
The forgiveness you sent out will be reflected back, and it will also cleanse the anger and hate.
The fear you sent out will be reflected back.
The peace you sent out will be reflected back, and it will cleanse the fear.
and so on.. and so on..
So no 'good' or 'bad' or anything in between will actually be 'nullified', however the variance will be balanced, and it shall be reflected on the 'overall state' of one soul.
This model is actually the 'eastern model', and the reflecting mechanism is known as the "Law Of Reciprocality" also known as the "Law of Karma". Similar to the other law of the universe, the law is applicable to everyone (and everything), regardless whether they believe in it or not, regardless of their religion, tradition, nationality, ethnicity, gender, holy books that they believe in, species etc..
From this 'framework' thus the golden rule was born.
Do unto others as you would have them do unto you.
Because it will be reflected back anyway...
And what is the 'state' of the soul?
"if you wish to understand the secret of the universe, think in terms of energy, frequency and vibration"-- Nikolai Tesla
The soul is a form of energy, known with many names, Chi, Prana, Aura.
It vibrate, and the vibration follows certain range of frequency and as described above it correlate with thoughts and emotions.
Negative emotion emits low frequency, Positive emotion emits high frequency.
That's why people adopting this model usually use the terms of 'rising your vibration' or 'lowering your vibration'.
The thought, emotion thus deed of Forgiving for example, it's categorized as among high frequency.
The more things that you are able to forgive it will also increase the amplitude or 'signal strength' within the frequency of forgiveness thus it will greatly increase your soul vibration. And vice versa, the less things that you are able to forgive will emit lower amplitude and it will increase your soul vibration with lesser amount.