Here we will see the difference between Evil Angels and Demons from Scripture. These are two kinds of evil spirits that a Christian may encounter during his lifetime, so it is important to know the difference and how to deal with each. For those who would say they are the "same thing", let me remind you that God's Word, every word, is precise and accurate, so when it says angel, it means angel, and when it says demon, it means demon - not an angel which is actually a demon, or a demon which is actually an angel. Evil Angels Inhabitants of the air/heavens, sometimes signified by "birds of the air" (Eph 2:2, Gen 15:11, Jude 1:8, Matt 13:19) Originally dwelt in and can access heaven (Job 1:6, Eph 6:12, Rev 12:7-9, Jude 1:8) Don't inhabit human bodies or animals (Jesus never cast an angel or even Satan the archangel out of anyone, He only cast out demons). Are powerful created beings, with some splendor or beauty (2 Cor 11:14), such that only the Lord is qualified to rebuke them (Jude 1:8-9) Cannot be cast out (because they don't dwell in human bodies), can only be rebuked by the Lord (Jude 1:9) and the way to deal with them is to submit to God and resist them (James 4:7) Demons Like wet places, eg the sea, lakes, bodies (humans, animals, who are mostly water), on the Earth (Luke 11:24, Matt 8:31-32) Sometimes signified by "creeping things" (Lev 11:41-43). Like to inhabit the bodies of human beings or animals (Matt 8:31), Jesus sought to cast them out and told his disciples to cast them out also (Matthew 10:1; Mark 3:14-15; Luke 9:1). Cannot access heaven (there is no record of any demon ever going to heaven). Unlike fallen angels they cannot pretend to be an angel of light, they have no beauty or splendor, are ugly, filthy, earthly, like to live in unclean places such as pigs and tombs (Matt 8:31, Mark 5:3). The way to deal with them, is to cast them out, by the authority and power of Christ in His name. The Bible never says to resist a demon, but to cast it out. It is easy to understand that evil angels are the 1/3 of angels that rebelled against God from Heaven. But it is not so clear what the demons are, so here is a suggestion. Three clues: 1) they feel at home in water, therefore must be used to water. 2) they feel at home in human bodies, therefore must be the spirits of human or human-like creatures. 3) their realm is the Earth, therefore must not have the ability to fly like the angels. From Scripture there is only one type of creature that would haunt in the seas and inhabit human bodies. The demons might be the souls/spirits of the human or human-angel (Gen 6:1-2) race that was destroyed by Noah's flood, for whom there was no redemption (unlike Noah and his family and the whole human race since).