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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And when evening was come, they brought him many possessed by devils: and he cast out the spirits by a word, and all who had illnesses he cured:
And Jesus said unto him, The foxes have holes, and the birds of the air have nests; but the Son of man hath not where he can lay his head.
AND having called unto him his twelve disciples, he gave them authority over unclean spirits, to cast them out, and to cure every disease, and every malady.
When the unclean spirit is indeed gone out of a man, he traverses through places destitute of water, in search of rest, but cannot find it. Then he saith, I will return to my mansion, whence I came; and on his arrival, he findeth it unoccupied, swept, and furnished. read more. Then goeth he, and taketh with himself seven other spirits more wicked than himself, and they enter in and dwell there: and the last state of that man is worse than the first. So shall it also be with this wicked generation.
Then shall he say also to those on the left hand, Depart from me, ye cursed, into everlasting fire, prepared for the devil and his angels:
And devils also went out of many, crying out, and saying, Thou art the Messiah the Son of God. And rebuking them, he suffered them not to speak: for they knew that he was the Messiah.
For our conflict is not merely against flesh and blood, but against principalities, and against powers, and against the rulers of the darkness of this world, and against wicked spirits in the aerial regions.
Thou believest that there is one God; thou doest well: the devils also believe and tremble.
Then was there war in the heaven: Michael and his angels warred against the dragon; and the dragon warred and his angels, and they could not prevail; neither was there any more place found for them in the heaven. read more. And the great dragon was cast out, that old serpent, who is called the Devil, and Satan, who deceiveth the whole world: he was cast out into the earth, and his angels were cast out with him.
For they are the spirits of demons doing wonders, which go forth unto the kings of the earth, and of the whole habitable globe, to gather them together unto the battle of that great day of God Almighty.