Something like this should be easy enough to answer. Yet there is great debate over such issue.
I shall only attempt to discuss evil is to judgment as darkness is to common sense.
Darkness is often spoken of as the cursed creation. But then, we do not sleep in broad daylight.
In His creation, God set order of things. There is high and there is low.
There are greater beings and there are lesser beings.
To make the lesser greater, without the approval of God, is therefore, sin. For it is to cultivate matters of creation against God's will.