Then it seems, I said, that it is not punishment chiefly and principally that the Deity, as Judge, afflicts sinners with; but He operates, as your argument has shown, only to get the good separated from the evil and to attract it into the communion of blessedness.
That, said the Teacher, is my meaning; and also that the agony will be measured by the amount of evil there is in each individual. For it would not be reasonable to think that the man who has remained so long as we have supposed in evil known to be forbidden, and the man who has fallen only into moderate sins, should be tortured to the same amount in the judgment upon their vicious habit; but according to the quantity of material will be the longer or shorter time that that agonizing flame will be burning; that is, as long as there is fuel to feed it. In the case of the man who has acquired a heavy weight of material, the consuming fire must necessarily be very searching; but where that which the fire has to feed upon has spread less far, there the penetrating fierceness of the punishment is mitigated, so far as the subject itself, in the amount of its evil, is diminished. In any and every case evil must be removed out of existence, so that, as we said above, the absolutely non-existent should cease to be at all. Since it is not in its nature that evil should exist outside the will, does it not follow that when it shall be that every will rests in God, evil will be reduced to complete annihilation, owing to no receptacle being left for it?
But, said I, what help can one find in this devout hope, when one considers the greatness of the evil in undergoing torture even for a single year; and if that intolerable anguish be prolonged for the interval of an age, what grain of comfort is left from any subsequent expectation to him whose purgation is thus commensurate with an entire age?
Why, either we must plan to keep the soul absolutely untouched and free from any stain of evil; or, if our passionate nature makes that quite impossible, then we must plan that our failures in excellence consist only in mild and easily-curable derelictions. For the Gospel in its teaching distinguishes between a debtor of ten thousand talents and a debtor of five hundred pence, and of fifty pence and of a farthing, which is “the uttermost” of coins; it proclaims that God's just judgment reaches to all, and enhances the payment necessary as the weight of the debt increases, and on the other hand does not overlook the very smallest debts. But the Gospel tells us that this payment of debts was not effected by the refunding of money, but that the indebted man was delivered to the tormentors until he should pay the whole debt; and that means nothing else than paying in the coin of torment the inevitable recompense, the recompense, I mean, that consists in taking the share of pain incurred during his lifetime, when he inconsiderately chose mere pleasure, undiluted with its opposite; so that having put off from him all that foreign growth which sin is, and discarded the shame of any debts, he might stand in liberty and fearlessness. Now liberty is the coming up to a state which owns no master and is self-regulating; it is that with which we were gifted by God at the beginning, but which has been obscured by the feeling of shame arising from indebtedness. Liberty too is in all cases one and the same essentially; it has a natural attraction to itself. It follows, then, that as everything that is free will be united with its like, and as virtue is a thing that has no master, that is, is free, everything that is free will be united with virtue. But, further, the Divine Being is the fountain of all virtue. Therefore, those who have parted with evil will be united with Him; and so, as the Apostle says, God will be “all in all”; for this utterance seems to me plainly to confirm the opinion we have already arrived at, for it means that God will be instead of all other things, and in all. For while our present life is active among a variety of multiform conditions, and the things we have relations with are numerous, for instance, time, air, locality, food and drink, clothing, sunlight, lamplight, and other necessities of life, none of which, many though they be, are God—that blessed state which we hope for is in need of none of these things, but the Divine Being will become all, and instead of all, to us, distributing Himself proportionately to every need of that existence. It is plain, too, from the Holy Scripture that God becomes, to those who deserve it, locality, and home, and clothing, and food, and drink, and light, and riches, and dominion, and everything thinkable and nameable that goes to make our life happy. But He that becomes “all” things will be “in all” things too; and herein it appears to me that Scripture teaches the complete annihilation of evil. If, that is, God will be “in all” existing things, evil; plainly, will not then be among them; for if any one was to assume that it did exist then, how will the belief that God will be “in all” be kept intact? The excepting of that one thing, evil, mars the comprehensiveness of the term “all.” But He that will be “in all” will never be in that which does not exist.
What then, I asked, are we to say to those whose hearts fail at these calamities?
We will say to them, replied the Teacher, this. “It is foolish, good people, for you to fret and complain of the chain of this fixed sequence of life's realities; you do not know the goal towards which each single dispensation of the universe is moving. You do not know that all things have to be assimilated to the Divine Nature in accordance with the artistic plan of their author, in a certain regularity and order. Indeed, it was for this that intelligent beings came into existence; namely, that the riches of the Divine blessings should not lie idle. The All-creating Wisdom fashioned these souls, these receptacles with free wills, as vessels as it were, for this very purpose, that there should be some capacities able to receive His blessings and become continually larger with the inpouring of the stream. Such are the wonders that the participation in the Divine blessings works: it makes him into whom they come larger and more capacious; from his capacity to receive it gets for the receiver an actual increase in bulk as well, and he never stops enlarging. The fountain of blessings wells up unceasingly, and the partaker's nature, finding nothing superfluous and without a use in that which it receives, makes the whole influx an enlargement of its own proportions, and becomes at once more wishful to imbibe the nobler nourishment and more capable of containing it; each grows along with each, both the capacity which is nursed in such abundance of blessings and so grows greater, and the nurturing supply which comes on in a flood answering to the growth of those increasing powers. It is likely, therefore, that this bulk will mount to such a magnitude as there is no limit to check, so that we should not grow into it. With such a prospect before us, are you angry that our nature is advancing to its goal along the path appointed for us? Why, our career cannot be run there-ward, except that which weighs us down, I mean this encumbering load of earthiness, be shaken off the soul; nor can we be domiciled in Purity with the corresponding part of our nature, unless we have cleansed ourselves by a better training from the habit of affection which we have contracted in life towards this earthiness. But if there be in you any clinging to this body, and the being unlocked from this darling thing give you pain, let not this, either, make you despair. You will behold this bodily envelopment, which is now dissolved in death, woven again out of the same atoms, not indeed into this organization with its gross and heavy texture, but with its threads worked up into something more subtle and ethereal, so that you will not only have near you that which you love, but it will be restored to you with a brighter and more entrancing beauty.”
Source: On the Soul and the Resurrection (New Advent)