Catechism of the Catholic Church

Although it is proper to each individual, original sin does not have the character of a personal fault in any of Adam's descendants. It is a deprivation of original holiness and justice, but human nature has not been totally corrupted: it is wounded in the natural powers proper to it; subject to ignorance, suffering, and the dominion of death; and inclined to sin-an inclination to evil that is called "concupiscence." Baptism, by imparting the life of Christ's grace, erases original sin and turns a man back toward God, but the consequences for nature, weakened and inclined to evil, persist in man and summon him to spiritual battle. (2515, 1264)