Today’s Gospel begins with Jesus “casting out a demon.” What are demons? The Epistle of Jude describes them as “angels who did not keep their proper domain, but left their own abode.” In other words, they are spirits who were part of God’s “host,” or military, but left their posts. Elsewhere God’s Word describes the demons particularly operating by telling lies, with the aim of destroying mankind. Some are very adept at damaging people through sickness and maladies. So Scripture gives us labels for different types of demons, such as spirits of error, spirits of weakness, and unclean spirits. The preeminent demon is sometimes called διάβολος, which means “the slanderer.” He is also called σατάν, “the adversary” or simply, “the enemy.” Every day bless yourself with the sign of the holy cross and ask for God’s protection against the demons….