52 Also another Felix of Buslaceni said: "In admitting heretics to the Church without baptism, let no one place custom before reason and truth; for reason and truth always exclude custom."
53. To him our answer is: You do not show the truth; you confess the existence of the custom. We should therefore do right in maintaining the custom which has since been confirmed by a plenary Council, even if the truth were still concealed, which we believe to have been already made manifest.
Source: On Baptism, Against the Donatists (New Advent)