The Winchester boys fight spirits that are left behind because they had unfinished business after they died.
The devil is pictured as a misguided lost soul that was just the devil because he disobeyed god, and demons all worship him as "Lucifer"
Death is just a small step in life because the winchester brothers have sacrificed life limb and soul to return each other to the living.
I'll stop here so I don't spoil any more about the show.
What are your thoughts on these occurances in the show and contradictions against them?
Like for me, I don't believe that spirits are left behind if someone has unfinished business, they'll simply vanish.
But the demons and lucifer versus God and humans quarrel I can agree with
Lucifer was revealed as the arch-angel cast down from heaven for disobeying the big man.
The struggle to keep each other alive by making a deal with the devil is what I agree with the most in the show, and the most believable...

