Revelation 1:18 The Lord rules the hells

                                                       Devil

¹⁸ I am he that liveth, and was dead; and, behold, I am alive for evermore, Amen; and have the keys of hell and of death. -Revelation 1:18 King James Version (KJV)

Heaven and Hell, by Emanuel Swedenborg, [1758], tr. by John C. Ager [1900] at sacred-texts.com

536. 

THE LORD RULES THE HELLS. ...the God of heaven is the Lord, thus... the whole government of the heavens is the Lord's government. And as the relation of heaven to hell and of hell to heaven is like the relation between two opposites which mutually act contrary to each other... so in order that all things and each thing may be kept in equilibrium it is necessary that He who rules the one should rule the other; for unless the same Lord restrained the uprisings from the hells and checked insanities there the equilibrium would perish and everything with it...

538 

A perception of the sphere of falsity [or false spiritual beliefs] from evil that flows forth from hell has often been granted me. It was like a perpetual effort to destroy all that is good and true, combined with anger and a kind of fury at not being able to do so, especially an effort to annihilate and destroy the Divine of the Lord, and this because all good and truth are from Him. But out of heaven a sphere of truth from good was perceived, whereby the fury of the effort ascending from hell was restrained. The result of this was an equilibrium. This sphere from heaven was perceived to come from the Lord alone, although it appeared to come from the angels in heaven. It is from the Lord alone, and not from the angels, because every angel in heaven acknowledges that nothing of good and of truth is from himself, but all is from the Lord.

541.

Hell, like heaven, is divided into societies, and into as many societies as there are in heaven; for every society in heaven has a society opposite to it in hell, and this for the sake of equilibrium. But evils and falsities therefrom are what distinguish the societies in hell, as goods and truths therefrom are what distinguish the societies in heaven. That for every good there is an opposite evil, and for every truth an opposite falsity...

542  

As hell is divided into the same number of societies as heaven, there are as many hells as there are societies of heaven; for as each society of heaven is a heaven in smaller form (see above, n. 51-58), so each society in hell is a hell in smaller form. As in general there are three heavens, so in general there are three hells, a lowest, which is opposite to the inmost or third heaven, a middle, which is opposite to the middle or second heaven, and... the outmost or first heaven. 

543.

How the hells are ruled by the Lord shall be briefly explained. In general the hells are ruled by a general outflow from the heavens of Divine good and Divine truth whereby the general endeavor flowing forth from the hells is checked and restrained; also by a particular outflow from each heaven and from each society of heaven. The hells are ruled in particular by means of the angels, to whom it is granted to look into the hells and to restrain insanities and disturbances there; and sometimes angels are sent to them who moderate these insanities and disturbances by their presence. But in general all in the hells are ruled by means of their fears. Some are ruled by fears implanted in the world and still inherent in them; but as these fears are not sufficient, and gradually subside, they are ruled by fears of punishments; and it is especially by these that they are deterred from doing evil. The punishments in hell are manifold, lighter or more severe in accordance with the evils. For the most part the more wicked, who excel in cunning and in artifices [or deceptions,] and who are able to hold the rest in subjection and servitude by means of punishments and consequent terror, are set over them; but these governors dare not pass beyond the limits prescribed to them. It must be understood that the sole means of restraining the violence and fury of those who are in the hells is the fear of punishment. There is no other way.

544.

It has been believed heretofore in the world that there is one devil that presides over the hells; that he was created an angel of light; but having become rebellious he was cast down with his crew into hell. This belief has prevailed because the Devil and Satan, and also Lucifer, are mentioned by name in the Word, and the Word in those places has been understood according to the sense of the letter. But by "the devil" and "Satan" there hell is meant, "devil" meaning the hell that is behind, where the worst dwell, who are called evil genii; and "Satan" the hell that is in front, where the less wicked dwell, who are called evil spirits; and "Lucifer" those that belong to Babel, or Babylon, who would extend their dominion even into heaven. That there is no one devil to whom the hells are subject is evident also from this, that all who are in the hells, like all who are in the heavens, are from the human race (see n. 311-317); and that those who have gone there from the beginning of creation to this time amount to myriads of myriads, and everyone of them is a devil in accord with his opposition to the Divine while he lived in the world (see above, n. 311, 312).