Here is a quote from an old Wikipedia article on the topic (that doesnt seem to be around anymore) that I thought explained it pretty well: "For many ancient Christians, Hell was the same "place" as Heaven: living in the presence of God and directly experiencing God's love. Whether this was experienced as pleasure or torment depended on one's disposition towards God. St. Isaac of Syria wrote in Mystic Treatises: "... those who find themselves in Hell will be chastised by the scourge of love. How cruel and bitter this torment of love will be! For those who understand that they have sinned against love, undergo greater suffering than those produced by the most fearful tortures. The sorrow which takes hold of the heart, which has sinned against love, is more piercing than any other pain. It is not right to say that the sinners in Hell are deprived of the love of God ... But love acts in two ways, as suffering of the reproved, and as joy in the blessed!" This ancient view is still the doctrine of the Eastern Orthodox Church."