The idea of a clearly divided Good and Evil is also a Christian idea that is present in Narnia. Aslan is representative of all that is good and his opposition represents evil. The Christian version of this is the constant battle between God and Satan.
Another element of this is idea of forgiveness of sins. Just as Aslan died on the table and was able to to forgive Edmund for his treachery in the first film Christian’s believe that Jesus died on the cross for the forgiveness of their sins.
thechristiannarnia.movie.blog 