User blog comment:Tommy,Klaus&Kol2012+/How exactly can you kill god and the darkness?/@comment-26982641-20181215113541/@comment-3045936-20181216015926

They are concepts in the terms of Being as God and Nothingness as Amara. And technically Amara shouldn’t exist as Darkness doesn’t scientifically exists. There is Light and the absence of light. It’s fine to use Darkness as an adjective for something or place lacking light. But it doesn’t exist as something it’s a condition of the absence of something. Similar to how Cold doesn’t exist as it can’t be measured and it’s an adjective for subjective low temperatures. But as she is a supernatural thing she can exist as darkness breaking this law. But I doubt the series writers thought of this comparison.

But they are concepts in the sense as they are the Fundamental Light and Darkness. While they are literal beings of supernatural power, they also are key to the Natural Order. Without the Equilibrium of their existence, reality collapses in on itself and not even the other one can fight against it. Amara Healing God stooped and reversed it, but even she couldn’t stop the Natural Order demanding God and her must live or possibly die together.

Think of Amara and God as entities made of Primordial God Power/Magic so they became both concepts and literal living things.