It could be said that the Gods rule the universe, or it could be said the Universe rules the gods.
The Gods and Angels know they are apart of the Godsoul, the universe's sentient fragments. As we are, as is everything energy.
Demons have been defined and redefined far too often in history, I consider them to be much maligned but also to have a purpose. For we all have a purpose.
Good and evil are human perspectives, and I do not believe anyone in the higher spiritual realms actually believe in such a struggle either. Nor do I believe there IS such a struggle in the higher realms, because it would be futile. Why fight ones self?
We are all afterall connected, and I personally see acts of True malevolence as results of a personal failing or as a result of an expressed pain. Ie a manifestation of the suffering of the soul.
Of course, thats just me.