George Leo Haydock

Not by the works, &c. St. Paul in this verse alludes to the sacrament of baptism. This text is brought by divines to prove that baptism, like every other sacrament, produces its effect by its own power, (or, as it is termed in the schools, ex opere operato) independently of any disposition on the part of the receiver. We are saved, says the apostle, not by the works of justice, or any good works we have performed, but our salvation must be attributed solely to the mercy of our Saviour, God, manifested to us by the washing itself of regeneration and renovation of the Holy Ghost. — By the laver of regeneration, &c.[2] That is, baptism, by which we are born anew the adoptive children of God, by the grace of the Holy Ghost, whom he hath poured, &c. (Witham)