Nicene and Post-Nicene Fathers: Series I/Volume IV/Donatist Controversy/On Baptism/Book VII/Chapter 19

36.&#160; Donatus of Cibaliana said:&#160; "I acknowledge one Church, and one baptism that appertains thereto.&#160; If there is any one who says that the grace of baptism exists among heretics, he must first show and prove that the Church exists with them."

37.&#160; To him we answer:&#160; If you say that the grace of baptism is identical with baptism, then it exists among heretics; but if baptism is the sacrament or outward sign of grace, while the grace itself is the abolition of sins, then the grace of baptism does not exist with heretics.&#160; But so there is one baptism and one Church, just as there is one faith.&#160; As therefore the good and bad, not having one hope, can yet have one baptism, so those who have not one common Church can have one common baptism.