What of us gets resurrected?
The answer, I think, is essentially 'that of us which is love'.
In other words, a person who has led a loving life will have plenty to resurrect (plenty from-which to re-create his immortal self); and by contrast, someone who is incapable of love, or has rejected it - cannot be resurrected, because there is nothing to resurrect.
The 'opposite' of love - that sin which is most opposed to the essential-master virtue of love - seems to be 'resentment' (which is more usually called 'pride' - but I think resentment captures the essence better).
Resentment cannot be carried into Heaven - so by repentance we must consent to its being stripped-away in the process of resurrection.
But this means that every aspect of us which is dominated by resentment will be (must be) removed before we can enter Heaven. A Man who has, though his life, built up a mass of personal resentments, will therefore lose a great deal of himself in salvation.
Hence the vital importance of forgiveness; because if we hold-onto a resentment directed against someone or some-institution; we are maiming our-selves now, and maiming the potential of our resurrected selves.
But if we choose to discard this resentment (if we 'forgive') then there is more of us that can be resurrected - we will be a larger person after resurrection.
Thus - the positive benefit from forgiveness is actually for the forgiver, not the forgiven.
One who nurses his resentment (a 'resenter') is often operating under the spite-full (and demonic) belief (or fantasy) that his sustaining of resentment harms its subject - which harm he desires; and therefore he refuses to forgive.
But at the worst extreme, the 'resenter' realizes that he cannot harm the subject of his resentment (either because they are in Heaven, or are no-more); and then a refusal to forgive becomes wholly negative, and necessarily spiritually self-harming.
This is why resentment (or 'pride') is often regarded as the worst of all sins, and why it can be understood as the opposite of the Christian injunction to love.
When indulged, when forgiveness is rejected; resentment can become the core of self-identity to the point where damnation is chosen.
Such is the situation of Satan; and such the incipient situation of those many Men for whom a resentment (and their own commensurate 'victim status') has been made their core value.
