There's no evidence that either man knew of the other, but George MacDonald and Fyodor Dostoevsky were contemporaries and spiritual brothers. The following is an excerpt from the latter's great novel, The Brothers Karamazov.
Of Hell and Hell Fire, a Mystic Reflection
Fathers and teachers, I ponder, "What is hell?" I maintain that it is the suffering of being unable to love. Once in infinite existence, immeasurable in time and space, a spiritual creature was given on his coming to earth the power of saying, "I am and I love." Once, only once, there was given him a moment of active lifting love, and for that was earthly life given him, and with it times and seasons. And that happy creature rejected the priceless gift, prized it and loved it not, scorned it and remained callous. Such a one, having left the earth, sees Abraham's bosom and talks with Abraham as we are told in the parable of the rich man and Lazarus, and beholds heaven and can go up to the Lord. But that is just his torment, to rise up to the Lord without ever having loved, to be brought close to those who have loved when he has despised their love. For he sees clearly and says to himself, "Now I have understanding, and though I now thirst to love, there will be nothing great, no sacrifice in my love, for my earthly life is over, and Abraham will not come even with a drop of living water (that is the gift of earthly active life) to cool the fiery thirst of spiritual love which burns in me now, though I despised it on earth; there is no more life for me and will be no more time! Even though I would gladly give my life for others, it can never be, for that life is passed which can be sacrificed for love, and now there is a gulf fixed between that life and this existence."
They talk of hell fire in the material sense. I don't go into that mystery and I shun it. But I think if there were fire in material sense, they would be glad of it, for I imagine that in material agony, their still greater spiritual agony would be forgotten for a moment. Moreover, that spiritual agony cannot be taken from them, for that suffering is not external but within them. And if it could be taken from them, I think it would be bitterer still for the unhappy creatures. For even if the righteous in Paradise forgave them, beholding their torments, and called them up to heaven in their infinite love, they would only multiply their torments, for they would arouse in them still more keenly a flaming thirst for responsive, active and grateful love which is now impossible. In the timidity of my heart I imagine, however, that the very recognition of this impossibility would serve at last to console them. For accepting the love of the righteous together with the impossibility of repaying it, by this submissiveness and the effect of this humility, they will attain at last, as it were, to a certain semblance of that active love which they scorned in life, to something like its outward expression... I am sorry, friends and brothers, that I cannot express this clearly. But woe to those who have slain themselves on earth, woe to the suicides! I believe that there can be none more miserable than they. They tell us that it is a sin to pray for them and outwardly the Church, as it were, renounces them, but in my secret heart I believe that we may pray even for them. Love can never be an offence to Christ. For such as those I have prayed inwardly all my life, I confess it, fathers and teachers, and even now I pray for them every day.
Oh, there are some who remain proud and fierce even in hell, in spite of their certain knowledge and contemplation of the absolute truth; there are some fearful ones who have given themselves over to Satan and his proud spirit entirely. For such, hell is voluntary and ever consuming; they are tortured by their own choice. For they have cursed themselves, cursing God and life. They live upon their vindictive pride like a starving man in the desert sucking blood out of his own body. But they are never satisfied, and they refuse forgiveness, they curse God Who calls them. They cannot behold the living God without hatred, and they cry out that the God of life should be annihilated, that God should destroy Himself and His own creation. And they will burn in the fire of their own wrath for ever and yearn for death and annihilation. But they will not attain to death...