Light and Darkness. For many, they are associated with good and evil, respectively. These concepts are, for most people, fundamental to the structure of the world.
There is good and there is evil, there is good and bad and for balance they must be in equal amounts.
If there is no darkness left in the world and light takes it over completely, then light will also disappear. The good will consume the world and cease to be good, the same situation will happen if darkness takes over. That is why for the good of the world they must be in perfect harmony.
Therefore, Stroph`s dissatisfaction that he got full harmony instead of darkness or light at once can be considered insane. His "Concept" was both "Darkness" and "Light" at once. He gained great power by creating a miracle.
So why did Stroph decide to change his "Concept" at the risk of even dying thereby? It's simple, because all the words above are complete nonsense applicable only to fairy tales.
