The way I read this is "Why are we here?" And why is satan around?
The book of Job answers these questions. We are here to resolve the kingdom conflict.
We see satan as judged. Why is he not in the pit right now?
Satans 5 "Iwills" ......one of them is "I will be like the most High" satan sinned and fell in his pride.
Go to the book of Job, and satan is basically accusing God of being UNFAIR. Stop and think about that for a moment. Only a freewill creature could say that to God.
So satan fell and God obviously Judged and condemned him. And we see him in Job, still free to wander, and calling God unfair.
We are in satans "appeal trial."
This attack on freewill is from Satan. It is basically satans accusation against God......" You are UNFAIR. Its not my fault."
We are created as freewill creatures. And we freely choose God. And we prove to satan that God is FAIR,loving,Just,full of Grace and mercy and righteous........we are witnesses that reveal Gods Glory to the world.
Eph 3:10~~New American Standard Bible
so that the manifold wisdom of God might now be made known through the church to the rulers and the authorities in the heavenly places.