Moreover, Jesus’ warning about the sin “that will not be forgiven” confirms the existence of sins which can bring down on the sinner the punishment of “eternal death.”
In the light of these and other passages of sacred Scripture, doctors and theologians, spiritual teachers and pastors have divided sins into mortal and venial. St. Augustine, among others, speaks of letalia or mortifera crimina, contrasting them with venialia, levia or quotidiana. The meaning which he gives to these adjectives was to influence the successive magisterium of the church. After him, it was St. Thomas who was to formulate in the clearest possible terms the doctrine which became a constant in the church.
But when we ponder the problem of a rebellious will meeting the infinitely just God, we cannot but experience feelings of salutary “fear and trembling,” as St. Paul suggests.(92) Moreover, Jesus’ warning about the sin “that will not be forgiven” confirms the existence of sins which can bring down on the sinner the punishment of “eternal death.”
In the light of these and other passages of sacred Scripture, doctors and theologians, spiritual teachers and pastors have divided sins into mortal and venial. St. Augustine, among others, speaks of letalia or mortifera crimina, contrasting them with venialia, levia or quotidiana.(93) The meaning which he gives to these adjectives was to influence the successive magisterium of the church. After him, it was St. Thomas who was to formulate in the clearest possible terms the doctrine which became a constant in the church.
In defining and distinguishing between mortal and venial sins, St. Thomas and the theology of sin that has its source in him could not be unaware of the biblical reference and therefore of the concept of spiritual death. According to St. Thomas, in order to live spiritually man must remain in communion with the supreme principle of life, which is God, since God is the ultimate end of man’ s being and acting. Now sin is a disorder perpetrated by the human being against this life-principle. And when through sin, the soul commits a disorder that reaches the point of turning away form its ultimate end God to which it is bound by charity, then the sin is mortal; on the other hand, whenever the disorder does not reach the point of a turning away from God, the sin is venial."(94) For this reason venial sin does not deprive the sinner of sanctifying grace, friendship with God, charity and therefore eternal happiness, whereas just such a deprivation is precisely the consequence of mortal sin.
Furthermore, when sin is considered from the point of view of the punishment it merits, for St. Thomas and other doctors mortal sin is the sin which, if unforgiven, leads to eternal punishment; whereas venial sin is the sin that merits merely temporal punishment (that is, a partial punishment which can be expiated on earth or in purgatory).”
Click
here for full text.
Further reading:
*Mortal Sin * (The Fathers)
Click
here.
Confession
Click
here.
Catechism of the Catholic Church
Sections 1854-1863
Click
here.