Roman Catechism 16.110

Chapter 16 — Part II: The Sacraments — Baptism

Section 110. Third Effect Of Baptism: Grace Of Regeneration — But to return to the effects of Baptism, it should be taught that by virtue of this Sacrament we are not only delivered from what are justly deemed the greatest of all evils, but are also enriched with invaluable goods and blessings. Our souls are replenished with divine grace, by which we are rendered just and children of God and are made heirs to eternal salvation. For it is written: He that believeth and is baptised, shall be saved, and the Apostle testifies that the Church is cleansed by the laver of water in the word of life. Now according to the definition of the Council of Trent, which under pain of anathema we are bound to believe, grace not only remits sin, but is also a divine quality inherent in the soul, and, as it were, a brilliant light that effaces all those stains which obscure the lustre of the soul, investing it with increased brightness and beauty. This is also a clear inference from the words of Scripture when it says that grace is poured forth, and also when it usually calls grace, the pledge of the Holy Ghost.