Argument.—On the Occasion of the Schism of Novatian, to Keep Back from Him the Carthaginians, Who Already Were Not Averse to Him, on Account of Novatus and Some Other Presbyters of His Church, Who Had Originated the Whole Disturbance, Cyprian Wrote This Treatise. And First of All, Fortifying Them Against the Deceits of These, He Exhorts Them to Constancy, and Instructs Them that Heresies Exist Because Christ, the Head of the Church, is Not Looked To, that the Common Commission First Entrusted to Peter is Contemned, and the One Church and the One Episcopate are Deserted. Then He Proves, as Well by the Scriptures as by the Figures of the Old and New Testament, the Unity of the Church.