"Therefore, rejoice, ye heavens, and ye that dwell in them. Woe to the inhabiters of the earth and of the sea; for the devil is come down unto you, having great wrath, because he knoweth that he hath but a short time."
From this it would appear that the Devil once lived in heaven, raised a rebellion, was defeated and cast out, and the inspired writer congratulates the angels that they are rid of him and commiserates us that we have him.
In the twentieth chapter of Revelation is the following:
"And I saw an angel come down from heaven, having the key of the bottomless pit and a great chain in his hand.
"And he laid Hold on the dragon—that old serpent, which is the Devil and Satan—and bound him a thousand years.
"And cast him into the bottomless pit, and shut him up, and set a seal upon him, that he should deceive the nations no more till the thousand years should be fulfilled; and after he must be loosed a little season."
It is hard to understand how one could be confined in a pit without a bottom, and how a chain of iron could hold one in eternal fire, or what use there would be to lock a bottomless pit; but these are questions probably suggested by the Devil.
We are further told that "when the thousand years are expired Satan shall be loosed out of his prison."
"And the Devil was cast into the lake of fire and brimstone where the beast and the false prophet are, and shall be tormented day and night forever."
In the light of the passages that I have read we can clearly see what the writers of the New Testament believed. About this there can be no honest difference. If the gospels teach the existence of God—of Christ—they teach the existence of the Devil. If the Devil does not exist—if little devils do not enter the bodies of men—the New Testament may be inspired, but it is not true.