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 was come, they brought unto him many that were possessed with devils, and he cast out the spirits with the word and healed all that were sick
And Jesus said unto him, The foxes have holes, and the birds of the heaven have nests, but the Son of man has nowhere to lay his head.
Then calling his twelve disciples, he gave them power against unclean spirits, to cast them out and to heal all manner of sickness and all manner of weakness.
When the unclean spirit is gone out of the man, it walks through dry places, seeking rest, and finds none. Then it says, I will return into my house from which I came out; and when it is come, it finds it empty, swept, and garnished. read more. Then it goes and takes with itself seven other spirits worse than itself, and they enter in and dwell there; and the last state of that man is worse than the first. Even so shall it also be unto this wicked generation.
Then he shall also say unto those who shall be on the left hand, Depart from me, ye cursed, into eternal fire, prepared for the devil and his angels;
And demons also came out of many, crying out and saying, Thou art the Christ, the Son of God. And he rebuking them suffered them not to speak, for they knew that he was the Christ.
For we wrestle not against flesh and blood, but against principalities, against powers, against the lords of this age, rulers of this darkness, against spiritual wickedness in the heavens.
Thou believest that God is one; thou doest well; the demons also believe and tremble.
And there was war in heaven: Michael and his angels fought against the dragon; and the dragon fought and his angels, and did not prevail; neither was their place found any more in heaven. read more. And the great dragon was cast out, the serpent of old, who is called Devil and the Satan, who deceives the whole world; he was cast out into the earth, and his angels were cast out with him.
For they are spirits of demons, working miracles, which go forth unto the kings of the earth and of the whole world to gather them to the battle of that great day of God Almighty.