Hey Carly,Here is what Norman Geislar has to say about the fall of Angels:Angels do not change in natureAlso, angels apparently have a fixed nature from the moment of their creation; angels do not change--unlike human beings, they do not grow old. They have no age, nor do they undergo any other kind of change. They have no accidents(characteristics not essential to them); hence, then cannot change accidently. The only change they can undergo is creation or annihilation by God, since, like all creatures, they exist only because God holds them in existence (Col. 1:17).Angels are irredeemableSince Angels cannot change, they are fixed in their nature; hence, once an angel sins, he is doomed forever (2Peter 2:4;Jude 6). Indeed, the Bible says explicitly that Christ did not die to redeem angels, "for surely it is not angels he helps, but Abraham's descendants" (Heb. 2:16). Those angels who sinned are never called upon to repent, nor can they be. The Cross is never presented as a means of their salvation, but only of their condemnation, for Jesus, "having disarmed the powers and authorities...made a public spectacle of them, triumphing over them by the cross" (Col. 2:15).Like all of God's rational and moral creatures, angels were given a choice. And, like humans at death (Heb. 9:27), once they have made their final choice, it is forever too late. Since they cannot change by nature, once angels make their decision, it is final and they know it (Matt. 8:29).Regarding the justice of Angelic condemnationIt seems unfair to some that humans were given an opportunity for redemption after they fell, while angels were not. Why did God not offer salvation for them as well?ResponseIn response to this question, several things are noteworthy. First, angles, like human beings, have a choice in their destiny. They freely chose to rebel against God: they were not forced to do so. They were not doomed against their will.Second, like human beings, angels were only doomed after their final choice--the only difference is that their first choice was also their final one. Humans too have a cut-off point, for "Man is destined to die once, and after that to face judgment"(Heb. 9:27).Third, the very nature of angels makes their first choice also their last one, for they are created simple beings. Hence, once angels make a choice to serve or rebel against God, it is permanent (one way or the other), just as once humans make their final choice (by death), it is forever (one way or the other).Fourth, unlike human beings (Acts 17:30;2Peter 3:9), angels are never called on to repent.In short, what is a lifetime for us is an instant for an angel. Once their mind is made up (by free choice), it is permanent. Since by nature angels cannot change, there is no possibility of redemption for them. God knowing this, had no need to provide salvation for them; hence, the Cross pronounces their condemnation but does not provide their salvation.Norman Geislar, Systematic Theology Vol.2 pp. 487-88; 498Also, in my opinion, what makes us redeemable as opposed to agels is that we have something in us that is redeemable, that being the image of God. Only man is said to be made in God's image. However, this is just speculation, because there is a lot we are not told in the Bible on this subject. But, knowing the character of God, if it were possible to redeem agels, He would have.