Spiritual War

I was reading the 66th Psalm the other day, and I was reminded of the spiritual enemies we all have. Some will read the Psalm and see it as speaking of human enemies only, and the rebellious humans against God. St. Paul said that our fight was not against flesh and blood, but against rulers and spiritual powers. If we truly believe this, then we have to know that there is a real struggle, a real war going on, that most of us just don't see (or believe).