Resource from Christian Apologetics & Research Ministry at http://www.carm.org (Joshua highly recommends)
Of course, there are fallen angels as well. Lucifer, another archangel, rebelled against God and became the devil. Following are verses often quoted in reference to the evil one.
* "How you have fallen from heaven, O star of the morning, son of the dawn! You have been cut down to the earth, You who have weakened the nations! 13 "But you said in your heart, "I will ascend to heaven; I will raise my throne above the stars of God, And I will sit on the mount of assembly In the recesses of the north. 14 "I will ascend above the heights of the clouds; I will make myself like the Most High,'" (Isaiah 14:12-14).
Most scholars agree that one third of the angels fell into sin and became demons.
* "And another sign appeared in heaven: and behold, a great red dragon having seven heads and ten horns, and on his heads were seven diadems.4 And his tail swept away a third of the stars of heaven, and threw them to the earth . . . " (Rev. 12:3-4).
In the future, there will be a judgment upon the fallen angels/demons:
* "Then shall he say also unto them on the left hand, Depart from me, ye cursed, into everlasting fire, prepared for the devil and his angels," (Matt. 25:41).
* "For if God spared not the angels that sinned, but cast them down to hell, and delivered them into chains of darkness, to be reserved unto judgment," (2 Pet. 2:4).
* "And the angels which kept not their first estate, but left their own habitation, he hath reserved in everlasting chains under darkness unto the judgment of the great day," (Jude 6).
* "And the great dragon was cast out, that old serpent, called the Devil, and Satan, which deceiveth the whole world: he was cast out into the earth, and his angels were cast out with him," (Rev. 12:9).
Demons are evil spirits that are opposed to God and God's people. They appear to be fallen angels: 2 Pet. 2:4; Jude 6 and are primarily referenced in the New Testament.
* Matt. 4:24, "And the news about Him went out into all Syria; and they brought to Him all who were ill, taken with various diseases and pains, demoniacs, epileptics, paralytics; and He healed them."
* Matt. 8:28, "And when He had come to the other side into the country of the Gadarenes, two men who were demon-possessed met Him as they were coming out of the tombs; they were so exceedingly violent that no one could pass by that road."
* Mark 3:22, "And the scribes who came down from Jerusalem were saying, 'He is possessed by Beelzebul,' and "He casts out the demons by the ruler of the demons."
* Luke 4:35, "And Jesus rebuked him, saying, "Be quiet and come out of him!"� And when the demon had thrown him down in their midst, he came out of him without doing him any harm."
* John 8:48-49, "The Jews answered and said to Him, "Do we not say rightly that You are a Samaritan and have a demon?" 49 Jesus answered, "I do not have a demon; but I honor My Father, and you dishonor Me"
Demons are spiritual beings without physical form. They are evil spirits that are opposed to God and his work. They are probably created before the world was and, like Satan, fell away from God. Some believe that Rev. 12:4 is a reference to a third of the angels falling and becoming demons.
The term demon comes from the Greek "daimon." Demons are found in the New Testament as being able to possess people (Matt. 8:28-34; Mark 5:1-4) and animals (Matt. 8:32). They are very strong (Mark 5:4). They are also called unclean spirits (Luke 8:29), seem to have a hierarchy of rulership in their demonic realm (Matt. 12:24-27), and can have sacrifices offered to them (1 Cor. 10:20). Also, they will be judged in the future (Matt. 8:29). They cannot be redeemed.
Paul recognized demonic forces and refer them as principalities (Rom. 8:38) and said that we struggle against them (Eph. 6:11-12). He speaks of them in the heavenly places, but this does not mean heaven where God is, but the upper realm above the earth.
Jesus was able to cast out demons from the demon possessed people (Matt. 8:32) and was falsely accused of being demon possessed (John 7:20; 8:48).
------------------------------------- Joshua’s additional note --------------------------------------
Jesus gave His disciples authority to drive out demons in His Name (Mar. 3:14-15, 6:7,13, Lk. 9:1, Matt. 10:1). The disciples continue to drive out demons and heal the sick after Jesus’ resurrection (Acts 5:16, 8:7, 11:12). Jesus gave the same authority to us as a sign that we belong to Him (Mar. 16:17, Lk. 10:17). Thus as we are confident to speak in tongues, we ought also to have the same complete confident to drive out demons in Jesus’ name.
Yet we also ought to be careful not to use Jesus’ name in vain as driving out demons is eventually God’s doing through us, not us by ourselves. It is surely not for unbelievers :
Acts 19:13-16 13 Some Jews who went around driving out evil spirits tried to invoke the name of the Lord Jesus over those who were demon-possessed. They would say, "In the name of Jesus, whom Paul preaches, I command you to come out." 14 Seven sons of Sceva, a Jewish chief priest, were doing this. 15 One day the evil spirit answered them, "Jesus I know, and I know about Paul, but who are you?" 16 Then the man who had the evil spirit jumped on them and overpowered them all. He gave them such a beating that they ran out of the house naked and bleeding.
Nevertheless, as believers who are commanded and given the authority to drive out demons and heal the sick, we ought not to be afraid as we are under God’s authority and protection to do so as commanded :
Mark 16:17 17 And these signs will accompany those who believe: In my name they will drive out demons; they will speak in new tongues;
Luke 10:17-20 17 The seventy-two returned with joy and said, "Lord, even the demons submit to us in your name." 18 He replied, "I saw Satan fall like lightning from heaven. 19 I have given you authority to trample on snakes and scorpions and to overcome all the power of the enemy; nothing will harm you. 20 However, do not rejoice that the spirits submit to you, but rejoice that your names are written in heaven."
