Here is the point of view of a few other URs on this subject.
"God delights to reconcile all, whether those on the earth, or those in the heavens (Col. 1:20). Therefore there is no more reason to suppose that Satan is not included therein than that any other certain creature is not included therein. Therefore it must be that that notable creature who had rightly long been termed "the Adversary," is very much included in the reconciliation of the universe, at which time this title ("Adversary" or "Satan") necessarily will no longer apply, since he will be reconciled and be at peace." (end quote)
Jim Coram, UNSEARCHABLE RICHES, March 2005.
"Ah, I long intently for that day when even the devil himself shall put away his pitchfork, hang up his horns, and come humbly and brokenly to the Father's house! Does that startle you? How else could it be in that glad day when the Christ has finally RECONCILED ALL THINGS IN HEAVEN AND IN EARTH, including all the PRINCIPALITIES AND POWERS OF THE HEAVENLY SPHERE!" (end quote)
RECONCILIATION IN THE HEAVENS – J. Preston Ebyhttp://www.godfire.net/eby/reconcilehvns.html
THE EVERLASTING GOSPEL – PAUL SIEGVOLCK
"Col. 1: 16-20 teaches us the extent of the reconciliation made by Christ, namely, that it extends itself over the whole creation. Therefore the fallen angels must also necessarily have their share in it, for they do incontestably belong to the invisible things created by Christ, and consequently to all things including the things in the heavens.
'Jehovah is good to all: and His tender mercies are over all His works.' Psalm 145:9
In this passage we are plainly told that the mercy of God, or His tender love, does not only extend itself to men, but universally towards all creatures that have their being and stand in need of mercy; and consequently also towards the fallen angels; which tender love of God must necessarily at last effect or bring about the restoration of all corrupt creatures, for it is not a weak or faint, but an almighty love." (end quote)
#197 – AVITUS and BASIL, A GRECIAN (approx. 410 A.D.) together taught
"Future torments are not endless; for although they are called everlasting, yet that word in the original Greek, does not, according to its etymology, and its frequent use, signify endless, but answers only to the duration of an age; so that every sinner, after the purification of his conscience, shall return into the unity of the body of Christ.
The devil himself will at length be saved, when all his wickedness shall have been subdued. (end quote)
#173 – ERSKINE'S SKETCHES OF CHURCH HISTORY records the words of John Gasper Christian Lavater.
"God is not gracious in time and cruel through eternity. Ascribe not to God, what in a human judge all would account a defect in wisdom and goodness, the punishing for the sake of punishing. It is enough my Creator, Thou art love. Love seeketh not her own; Thou seekest the happiness of all, and shouldst Thou not then find what Thou seekest? Shouldst Thou not be able to do what Thou willest?
My prayers are comprehensive. I embrace in my heart all men; present and future times, and nations, yea Satan himself. I present them all to God, with the warmest wishes that He will have mercy on them all." (end quote)
#137 – CLOUDS AND SUNSHINE – J.S. Taylor
I cannot believe that any being will exist in any part of the universe, so steeped in guilt and anguish (no, not Satan himself), as to be beyond the redeeming love and healing power of the Creator.
Oh, no; on the contrary, I believe that in this mysterious, but divinely ordained conflict of good and evil, the powers of light are everywhere slowly but surely gaining the ascendancy over the powers of darkness, and that it will continue to be so, even unto the perfect day; yes, that perfect day, wherein all these blessed victories over sin and ignorance shall have been consummated, these transformations completed, and no solitary stain of folly, guilt, or grief, be left to mar the lustre of the universe." (end quote)
#194 – Gregory of Nyssa (335-390)
What is the scope of St. Paul's dissertations? That the nature of evil shall, at length, be wholly exterminated, and divine immortal goodness embrace within itself every rational creature; so that of all who were made by God, not one shall be excluded from His kingdom. All the viciousness that like a corrupt matter is mingled in things shall be dissolved and consumed in fire; and everything shall be restored to its pristine state of purity.
In 1Cor. 15:22-28, the apostle Paul declares the extinction of all sin, saying that God will be All in all. For God will be truly All in all only when no evil shall remain in the nature of things. All evil must at length, be entirely removed from everything, so that it shall no more exist. For such being the nature of sin, that it cannot exist without a corrupt motive, it must, of course, be perfectly dissolved and wholly destroyed, so that nothing can remain a receptacle of it, when all motive and influences shall spring from God alone.
As the devil assumed a fleshly shape in order to ruin human nature, so the Lord took flesh for the salvation of man; and thus He blesses not only him who was ruined, but him also who led him into perdition; so that He both delivers man from sin, and heals the author of sin himself." (end quote)
#196 – COMMENTARY ON THE NEW TESTAMENT – Jerome (347-420 A.D.)
"In the end or consummation of things, all shall be restored to their original state, and be again united in one body. We cannot be ignorant that Christ's blood benefited the angels and those who are in hell; though we know not the manner in which it produced such effects. The apostate angels shall become such as they were created; and man, who has been cast out of paradise, shall be restored thither again. And this shall be accomplished in such a way, that all shall be united together by mutual charity, so that the members will delight in each other, and rejoice in each other's promotion.
The apostate angels, and the prince of this world, though now ungovernable, plunging themselves into the depths of sin, shall, in the end, embrace the happy dominion of Christ and His saints."