Not by works of righteousness which we have done, but according to his mercy he saved us, by the washing of regeneration, and renewing of the Holy Spirit;
All Commentaries on Titus 3:5 Go To Titus 3
Ambrose of Milan
AD 397
Who is the one who is born of the Spirit and is made Spirit? It is one who is renewed in the Spirit of his mind. It is one who is regenerated by water and the Holy Spirit. We receive the hope of eternal life through the laver of regeneration and renewing of the Holy Spirit. And elsewhere the apostle Peter says: “You shall be baptized with the Holy Spirit.” For who is he that is baptized with the Holy Spirit but he who is born again through water and the Holy Spirit? Therefore the Lord said of the Holy Spirit, “Truly, truly, I say to you, except a man be born again by water and the Spirit, he cannot enter into the kingdom of God.” And therefore he declared that we are born of him into the kingdom of God by being born again by water and the Spirit. .