Angels are basically classified as either righteous or evil. The former retain their holy state and service to God and are called elect angels (1 Tim 5:21), whereas the latter have defected from their original state and continue in constant rebellion against God. Satan is the leader of all fallen angels (Matt 25:41; cf. Rev 12:7, 9), which Scripture designates as evil spirits (1 Sam 16:14; Luke 7:21), demons (Matt 8:31), and unclean spirits (Mark 5:1-4). These have been operating for millennia trying to frustrate the purposes of God.
Demons have some freedom, but not beyond the boundaries God has established (Job 1:1-21). God sometimes uses fallen angels to accomplish His sovereign purposes (1 Sam 16:14-16; 2 Cor 12:7-10), just as He sometimes uses sinful people to bring about His will (Acts 2:23-24; 4:27-28). The final destiny of Satan and demons will be the Lake of Fire, which God created as a special place of punishment for them (Matt 25:41). Those who reject Christ as Savior will join Satan in the Lake of Fire (Rev 20:11-15). Those who accept Jesus as Savior are forgiven all their sins (Eph 1:7; Heb 10:10-14), given eternal life (John 3:16; 10:28), and will spend forever in heaven (John 14:1-3).
Fallen angels are involved in the affairs of mankind. The person who operates by negative volition aligns himself with Satan and his forces. Negative volition leads to idolatry, and idolatry leads to immorality (Rom 1:18-32), both individually and nationally. The worship of idols is the worship of demons (Lev 17:7; Deut 32:17; 1 Cor 10:19-21). Demons generally led the pagan nations into idolatry, which God’s people were not to practice (Deut 18:9-14). However, when God’s people mingled with them, they learned their idolatrous practices (1 Ki 11:1-8), and even created their own idols (1 Ki 12:26-33), which eventuated in human sacrifice (2 Ki 17:7-23; Psa 106:35-38; cf. 2 Ki 16:1-4; 21:1-9; Jer 32:30-35; Ezek 16:20-21; 20:31; 23:37).
When rulers turned away from God, He would use evil spirits to discipline them (Judg 9:23; 1 Sam 16:14-15). This resulted in the disciplined person experiencing mental madness and murderous behavior (1 Sam 18:10-12; cf. 1 Sam 19:9-10). God used an evil spirit to bring about the military defeat and death of King Ahab (2 Chron 18:18-22).
Some angels who were once free, are now kept in “eternal bonds under darkness for the judgment of the great day” and appear to have forfeited their freedom altogether due to some unnamed sinful violation (Jude 1:6), perhaps the account described in Genesis 6:1-5. And some very destructive angels (described as metal-like locusts) are now kept in the Abyss—a temporary spiritual prison—and will be released and led by a powerful angel whose name in Hebrew is Abaddon and in Greek Apollyon (Rev 9:1-12). Four unnamed, but very dangerous angels, are said to be bound under the River Euphrates (Rev 9:13-16). These four angels will kill one third of mankind during the Great Tribulation. Other evil spirits will be used to gather world rulers and their armies together for the Battle of Armageddon (Rev 16:13-14; cf. Rev 19:11-21).
As Christians, we face social, political and religious attacks in our day, and there are dark spiritual forces at work driving much of what we see. Scripture is very clear when it says, “our struggle is not against flesh and blood, but against the rulers, against the powers, against the world forces of this darkness, against the spiritual forces of wickedness in the heavenly places” (Eph 6:12). These demonic forces are behind every act of terror the world has ever known, and their activity is tireless. Thankfully, God has given us armor and a weapon to protect us, which also serve to aid in the rescue and defense of others who face spiritual attacks. This is described in Ephesians 6:13-18.
Therefore, take up the full armor of God, so that you will be able to resist in the evil day, and having done everything, to stand firm. Stand firm therefore, having girded your loins with truth, and having put on the breastplate of righteousness, and having shod your feet with the preparation of the gospel of peace; in addition to all, taking up the shield of faith with which you will be able to extinguish all the flaming arrows of the evil one. And take the helmet of salvation, and the sword of the Spirit, which is the word of God. With all prayer and petition pray at all times in the Spirit, and with this in view, be on the alert with all perseverance and petition for all the saints” (Eph 6:13-18).
Dr. Steven R. Cook
Audio lesson for Demons and How They Influence Mankind