Reference: Daemon
Easton
the Greek form, rendered "devil" in the Authorized Version of the New Testament. Daemons are spoken of as spiritual beings (Mt 8:16; 10:1; 12:43-45) at enmity with God, and as having a certain power over man (Jas 2:19; Re 16:14). They recognize our Lord as the Son of God (Mt 8:20; Lu 4:41). They belong to the number of those angels that "kept not their first estate," "unclean spirits," "fallen angels," the angels of the devil (Mt 25:41; Re 12:7-9). They are the "principalities and powers" against which we must "wrestle" (Eph 6:12).
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When evening came, they brought to Him many who were under the power of demons, and He drove out the spirits with a word and restored to health all who were sick.
And Jesus replied to him, Foxes have holes and the birds of the air have lodging places, but the Son of Man has nowhere to lay His head.
And Jesus summoned to Him His twelve disciples and gave them power and authority over unclean spirits, to drive them out, and to cure all kinds of disease and all kinds of weakness and infirmity.
But when the unclean spirit has gone out of a man, it roams through dry [arid] places in search of rest, but it does not find any. Then it says, I will go back to my house from which I came out. And when it arrives, it finds the place unoccupied, swept, put in order, and decorated. read more. Then it goes and brings with it seven other spirits more wicked than itself, and they go in and make their home there. And the last condition of that man becomes worse than the first. So also shall it be with this wicked generation.
Then He will say to those at His left hand, Begone from Me, you cursed, into the eternal fire prepared for the devil and his angels!
And demons even came out of many people, screaming and crying out, You are the Son of God! But He rebuked them and would not permit them to speak, because they knew that He was the Christ (the Messiah).
For we are not wrestling with flesh and blood [contending only with physical opponents], but against the despotisms, against the powers, against [the master spirits who are] the world rulers of this present darkness, against the spirit forces of wickedness in the heavenly (supernatural) sphere.
You believe that God is one; you do well. So do the demons believe and shudder [in terror and horror such as make a man's hair stand on end and contract the surface of his skin]!
Then war broke out in heaven; Michael and his angels went forth to battle with the dragon, and the dragon and his angels fought. But they were defeated, and there was no room found for them in heaven any longer. read more. And the huge dragon was cast down and out -- "that age-old serpent, who is called the Devil and Satan, he who is the seducer (deceiver) of all humanity the world over; he was forced out and down to the earth, and his angels were flung out along with him.
For really they are the spirits of demons that perform signs (wonders, miracles). And they go forth to the rulers and leaders all over the world, to gather them together for war on the great day of God the Almighty.