Now if anyone is perplexed and does not understand how it is possible for God's love to render anyone pitifully wretched and miserable and even burning as it were in flames, let him consider the elder brother of the prodigal son. Was he not in his father's estate? Did not everything in it belong to him? Did he not have his father's love? Did his father not come himself to entreat and beseech him to come and take part in the joyous banquet? What rendered him miserable and burned him with inner bitterness and hate? Who refused him anything? Why was he not joyous at his brother's return? Why did he not have love either toward his father or toward his brother? Was it not because of his wicked, inner disposition? Did he not remain in hell because of that? And what was this hell? Was it any separate place? Were there any instruments of torture? Did he not continue to live in his father's house? What separated him from all the joyous people in the house if not his own hate and his own bitterness? Did his father, or even his brother, stop loving him? Was it not precisely this very love which hardened his heart more and more? Was it not the joy that made him sad? Was not hatred burning in his heart, hatred for his father and his brother, hatred for the love of his father toward his brother and for the love of his brother toward his father? This is hell: the negation of love; the return of hate for love; bitterness at seeing innocent joy; to be surrounded by love and to have hate in one's heart. This is the eternal condition of all the damned. They are all dearly loved. They are all invited to the joyous banquet. They are all living in God's Kingdom, in the New Earth and the New Heavens. No one expels them. Even if they wanted to go away they could not flee from God's New Creation, nor hide from God's tenderly loving omnipresence. Their only alternative would be, perhaps, to go away from their brothers and search for a bitter isolation from them, but they could never depart from God and His love. And what is more terrible is that in this eternal life, in this New Creation, God is everything to His creatures. As Saint Gregory of Nyssa says, "In the present life 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 in the stead of all to us, distributing Himself proportionately to every need of that existence. It is plain, too, from the Holy Scriptures that God becomes to those who deserve it, locality and home and clothing and food and drink and light and riches and kingdom, and everything that can be thought of and named that goes to make our life happy" (On the Soul and the Resurrection). 46
In the new eternal life, God will be everything to His creatures, not only to the good but also to the wicked, not only to those who love Him, but likewise to those who hate Him.
But how will those who hate Him endure to have everything from the hands of Him Whom they detest? Oh, what an eternal torment is this, what an eternal fire, what a gnashing of teeth!
http://www.orthodoxpress.org/parish/river_of_fire.htm