By his salvific work, the only-begotten Son liberates man from sin and death. First off he blots out from human history the dominion of sin, which took root under the influence of the evil Spirit, beginning with Original Sin, and then he gives man the possibility of living in Sanctifying Grace. In the wake of his victory over sin, he also takes away the dominion of death, by his Resurrection beginning the process of the future resurrection of the body. Both are essential conditions of "eternal life," that is of man's definitive happiness in union with God; this means, for the saved, that in the eschatological perspective suffering is totally blotted out.
--Salvicifi Doloris, John Paul II