Spiritual Warfare
"Some speak of [Spiritual Warfare as being] the struggle between good and evil. Others talk of the battle between right and wrong, or between light and darkness. Still others refer to the conflict between the positive forces which seek to preserve life and order in the universe and the negative forces which tend to disturb and even destroy life and order. From a biblical perspective, however, this dualism is revealed to be an on-going conflict waged on two fronts: God and His angelic kingdom confront Satan and his demonic kingdom, while the children of God contend with the children of Satan." -- Ed Murphy, author of The Handbook for Spiritual Warfare