Errors concerning baptism

There have been certain errors concerning this Sacrament. The first was 

that of the Solentiani, who received a baptism not of water but of the 

spirit. Against them the Lord says: "Unless a man be born again of water 

and the Holy Spirit, he cannot enter into the kingdom of God." The second 

error was that of the Donatists, who re-baptized those who had been 

baptized by the Catholics. Against them it is written: "One faith, one 

baptism." They also err in holding that a man in the state of sin cannot 

baptize. Against them it is said: "He upon whom thou shalt see the Spirit 

descending, and remaining upon Him, He it is that baptizeth." It is thus 

seen that a minister who is himself evil does not invalidate either this or 

any of the other Sacraments, because it is Christ who, by the merits of His 

passion, gives to each Sacrament its efficacy; and He is good. The fourth 

error is that of the Pelagians who say that children must be baptized 

because by their regeneration they, as adopted children of God, are 

admitted into the kingdom, but by this regeneration they are not freed from 

original sin.