But false teachers are fools - no better than animals.  They do whatever they feel like; born only to be caught and killed, they laugh at the terrifying powers of the underworld, which they know so little about; and they will be destroyed along with all the demons and powers of Hell. 2 Peter

For we are not fighting against people made of flesh and blood, but against the evil rulers and authorities of the unseen world, against those mighty powers of darkness who rule this world, and against wicked spirits in the heavenly realms. Ephesians

When they arrived at the other side of the lake, a demon-possessed man ran out from a graveyard, just as Jesus was climbing from the boat.  This man lived among the gravestones, had such strength that whenever he was put into handcuffs and shackles - as he often was - he snapped the handcuffs from his wrists and smashed the shackles and walked away.  No one was strong enough to control him.  All day long and through the night he would wander among the tombs and in the wild hills, screaming and cutting himself with sharp pieces of stone.

When Jesus was still far out on the water, the man had seen Him and had run to meet Him, and fell down before Him.  Then Jesus spoke to the demon within the man and said, “Come out, you evil spirit.” It gave a terrible scream, shrieking, “What are you going to do to me, Jesus, Son of the most High God?  For God’s sake, don’t torture me!”  “What is your name?” Jesus asked, and the demon replied, “Legion, for there are many of us here within this man.” Then the demons begged him again and again not to send them to some distant land.  Now as it happened there was a huge herd of hogs rooting around on the hill above the lake.  “Send us into those hogs,” the demons begged.  And Jesus gave them permission.  Then the evil spirits came out of the man and entered the hogs, and the entire herd plunged down the steep hillside into the lake and drowned. Mark

And God gave Paul the power to do unusual miracles, so that even when his handkerchiefs or parts of his clothing were placed upon sick people, they were healed, and any demons within came out.

A team of itinerant Jews who were traveling from town to town casting out demons planned to experiment by using the name of Lord Jesus.  The incantation they decided on was this: “I adjure you by Jesus, whom Paul preaches, to come out!”  Seven sons of Sceva, a Jewish priest, were doing this.  But when they tried it on a man possessed by a demon, the demon replied, “I know Jesus and I know Paul, but who are you?”  And he leaped on two of them and beat them up so that they fled out of his house naked and badly injured.

The story of what happened spread quickly all through Ephesus, to Jews and Greeks alike.  A solemn fear descended on the city, and the name of the Lord Jesus was greatly honored.  Many who became believers confessed their sinful practices.  A number of them who had been practicing magic brought their incantation books and burned them at a public bonfire.  The value of the books was several million dollars.  So the message about the Lord spread widely and had a powerful effect. Acts

Now the Holy Spirit tells us clearly that in the last times some will turn away from what we believe; they will follow lying spirits and teachings that come from demons. These teachers will tell lies with straight faces and do it so often that their consciences won’t even bother them. 1 Timothy

So, dear friends, carefully avoid idol-worship of every kind.

You cannot drink from the cup at the Lord’s table and at Satan’s table too.  You cannot eat bread both at the Lord’s table and at Satan’s table. Corinthians