Council of Trent’s teaching:
Decree of Justification  Ch. III  For as in truth men, if they were not
born propagated of the seed of Adam, would not be born unjust,
--seeing that, by that propagation, they contract through him, when
they are conceived, injustice as their own,--so, if they were not born
again in Christ, they never would be justified; seeing that, in that new
birth, there is bestowed upon them, through the merit of His
passion, the grace whereby they are made just. For this benefit
the apostle exhorts us, evermore to give thanks to the Father, who
hath made us worthy to be partakers of the lot of the saints in
light, and hath delivered us from the power of darkness, and hath
translated us into the Kingdom of the Son of his love, in whom we
have redemption, and remission of sins.
Church’s teaching: both before and since the Reformation the Church
faithfully taught that original sin wounded human nature, but
through faith and Baptism, total regeneration is accomplished and
men are divinized--given a share of the Divine Life Itself.