if you want to understand the diversity of life other side (spirit world) just look at the diversity of life in this realm. Living conscious beings abound here but humans can seem only to imagine "angels" and "demons" on the other side.
the evil Q speaks of is as "real" as anything you've ever experienced. it's just happening in the next realm over and not able to be seen by most.
We can easily feel it though, and participate in over throwing evil with GOOD. Fear vs LOVE.
dark vs light