Answer
The Bible does not provide extensive information on various types of demons. However, throughout history, different theologians have created diverse classifications for demons and other related details. One of the earliest examples is the pseudepigraphical Testament of Solomon. In the Middle Ages, there was a proliferation of written works discussing demons, often categorizing them based on the sins they influenced or their activities. For example, each of the “seven deadly sins” was believed to be associated with a specific demon.
The Bible serves as our primary trustworthy source regarding demons, yet it offers limited information about them. There are no direct references in the Bible to classifications or types of demons. Although Jesus mentions a distinct “kind” of evil spirit in Mark 9:29, He does not provide a specific name. Much of our understanding of demons is deduced from their roles in biblical passages. Ministries focused on deliverance from demons tend to emphasize them more than the Bible does.
In certain religious and Charismatic circles, there has been a development of detailed but speculative demonology. Different evil spirits are labeled as “Jezebels,” “pythons,” “Delilahs,” “mermaids,” “Absaloms,” and so on. However, none of this aligns with biblical teachings. The Scriptures do not support the idea of distinct classes of demons or the belief that present-day Christians possess the ability to rebuke or exorcise them. Creating such contemporary mythologies is detrimental to the mission of Christ.
Ephesians 6:10–18, which extensively discusses spiritual warfare and the full armor of God in the New Testament, mentions that “our struggle is not against flesh and blood, but against the rulers, against the authorities, against the powers of this dark world, and against the spiritual forces of evil in the heavenly realms.” However, the focus here is on the tools provided by God for achieving victory; there is no emphasis on specific classes or types of demons.
No mention of techniques to bind or cast out the evil forces. While some see the beings mentioned (rulers, authorities, powers, and spiritual forces) as different classifications of demons, this is simply reading into the text more than it is telling us.
From the biblical evidence, we infer that demons are fallen angels that followed Satan when he rebelled. Revelation 12 says that the dragon (Satan) swept one-third of the stars from heaven. However, the origin of demons is far from clear, and the conclusion that they are fallen angels is disputed by some. In Revelation 12:9, we read, “The great dragon was hurled down—that ancient serpent called the devil, or Satan, who leads the whole world astray. He was hurled to the earth, and his angels with him.” Likewise, in Matthew 25:41, Jesus says that on Judgment Day He will say to some people, “Depart from me, you who are cursed, into the eternal fire prepared for the devil and his angels.” This may mean that the demons are fallen angels who fell when Satan did, or it might mean that demons are called “angels” in the basic sense that they are Satan’s “messengers” (the literal meaning of the word angels).
With certainty, we can say that demons are the messengers or minions of Satan. The word demon is not used in the Old Testament (although evil spirits are mentioned), but by the time of the New Testament, Jewish theologians had done a lot of speculating about them. The concept of demons or evil spirits was also common in other religious thought at the time. The gospels seem to assume that much of what was thought about demons at the time is true. We see Jesus casting out demons (e.g., Matthew 8:28-33), and we see that they are often responsible for causing physical illness, which Jesus healed by casting out the demon e.g., Matthew 9:33. Paul tells us that demons are behind the worship of pagan gods and that a sacrifice to an idol is really a sacrifice to a demon (1 Corinthians 10:19-20).
Whenever there are gaps in our knowledge, it is natural to want to fill them in. However, concerning knowledge of demons, most of the information used to fill these gaps is baseless and at times sensational speculation. We understand that demons are malevolent spirits who, in alignment with and under the guidance of Satan, engage in warfare against God and humanity. It is reasonable to view them as counterparts to the celestial angels who serve individuals on behalf of God. We are aware that they have been fundamentally defeated by Christ on the cross and that their ultimate destination will be eternal suffering in a place prepared for them “Then he will say to those on his left, ‘Depart from me, you who are cursed, into the eternal fire prepared for the devil and his angels.'” , (Matthew 25:41).