Nicene and Post-Nicene Fathers: Series I/Volume IV/Donatist Controversy/On Baptism/Book VII/Chapter 31

60.&#160; Tenax of Horrea Celi&#230; said:&#160; "There is one baptism, but of the Church; and where the Church is not, there baptism also cannot be."

61.&#160; To him we answer:&#160; How then comes it that it may be where the rock is not, but only sand; seeing that the Church is on the rock, and not on sand?